English dropdown-ico

A.O. Smith EQ 155 G manual

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of A.O. Smith EQ 155 G, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of A.O. Smith EQ 155 G one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of A.O. Smith EQ 155 G. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of A.O. Smith EQ 155 G should contain:
- informations concerning technical data of A.O. Smith EQ 155 G
- name of the manufacturer and a year of construction of the A.O. Smith EQ 155 G item
- rules of operation, control and maintenance of the A.O. Smith EQ 155 G item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of A.O. Smith EQ 155 G alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of A.O. Smith EQ 155 G, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the A.O. Smith service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of A.O. Smith EQ 155 G.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the A.O. Smith EQ 155 G item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • Page 1

    INST ALLA TION- AND USER INSTRUCTIONS HOT WATER STORAGE HEATERS UNITED KINGDOM / IRELAND MODELS EQ 115 G EQ 155 G EQH 200 G[...]

  • Page 2

    2 Read these installation instructions first before installing the appliance. Carefully read the user instructions before igniting the appliance. Failure to follow these instructions may lead to risk of explosion and/or fire and could cause material damage and/or bodily harm. Installation and commissioning should be carried out by a qualified compe[...]

  • Page 3

    3 CONTENTS PAGE 1. General . ........................................................................................................... 4 1.1 Description of the appliance ............................................................................ 4 1.2 Technical safety equipment ....................................................................[...]

  • Page 4

    4 1. GENERAL 1.1 Description of the appliance Construction of the water heater is in accordance with the European standard for gas heated water storage heaters for sanitary application (EN 89). The appliance thus meets the European Directory for Gas Appliances and is therefore entitled to carry the CE- marking. It is an open flued appliance without[...]

  • Page 5

    5 Figure 1 - Cross-section of the heater 1) Draught diverter 2) Hot water outlet 3) Insulation 4) Flue tube 5) Glass lined tank 6) Gas control valve 7) Cold-water inlet 8) T&P valve connection 9) Outer casting 10) Flue baffle 11) Sacrificial anode 12) Drain valve 13) Atmospheric burner 14) Pilot light burner with thermocouple AOS 0478[...]

  • Page 6

    6 1.2 Technical safety equipment 1.2.1 Gas control valve The water heater has been fitted with a gas control block consisting of a thermo-electrical pilot flame safeguard, pilot flame pressure regulator, burner pressure regulator, a control thermostat (adjustable between 30°C and 71°C) and a safety thermostat (82°C). This gas control block with [...]

  • Page 7

    7 Figure 2 - Gas control block with T.R.S. 1) T.R.S. thermostat 2) Sensor combustion products dicharge safety device 3) Thermocouple with built-in interrupter 4) Thermocouple 5) Gas control block 6) Reset button 7) Pilot burner 8) Temperature regulator knob AOS 0479[...]

  • Page 8

    8 1.3 Technical description 1.3.1 Dimensions These water heaters are only suitable for a flue tube with minimal the announced diameter (dimension G). Dimensions EQ 115 EQ 155 EQH 200 A 1280 1370 1670 B 1120 1210 1540 D 465 515 515 F 545 595 605 G 80 80 100 K 325 325 380 L 270 295 395 M 1180 1270 1590 N 1180 1270 1590 R 230 230 255 S 945 1030 1380 V[...]

  • Page 9

    9 Figure 3 - Dimensions AOS 0481[...]

  • Page 10

    10 GENERAL Storage capacity litres 1 09 144 181 Water connections ** - 3 / 4 " - 14 NPT 3 / 4 " - 14 NPT 3 / 4 " - 14 NPT Gas connection - ISO 7 / 1 Rp 1 / 2 ISO 7 / 1 Rp 1 / 2 ISO 7 / 1 Rp 1 / 2 Drain valve - 3 / 4 " - 14 NPT 3 / 4 " - 14 NPT 3 / 4 " - 14 NPT Anode - 3 / 4 " - 14 NPT 3 / 4 " - 14 NPT 3 / 4 &[...]

  • Page 11

    11 2. FOR THE INSTALLER 2.1 Installation instructions This water heater must be fitted in a location which will permit the provision of an approved flue system and adequate ventilation. A service clearance of 15 cm at the sides and rear of the unit and 60 cm at the front of the unit should be allowed for ease of servicing. Adequate distance must be[...]

  • Page 12

    12 1) Manual gas valve 2) Stop valve 3) Expansion vessel 4) T&P safety valve 5) Non return valve 6) Circulation pump 7) Drain valve Figure 4 - Connection diagram (unvented system) 8) Pressure limiting valve 9) Expansion valve A) Gas supply B) Hot water delivery C) Cold water inlet D) Hot water taps E) Return circulation See Figure 4. A.O. Smith[...]

  • Page 13

    13 2.1.3 Gas connection The gas supply to this appliance must be installed in accordance with BS 6891 (1988). Fit the 1/2" gas supply cock supplied with this unit immediately before the gas control block. No heat or soldered joints should be applied in the vicinity of the gas control block, as they could cause damage to the control. All connec[...]

  • Page 14

    14 2.2 Commissioning 2.2.1 Filling the water heater 1. Close the drain tap. 2. Open the cold water tap to the water heater and open all taps where hot water can be drained for de- aeration. The water heater is filled as soon as cold water flows from all taps. 3. Close all hot water taps. 2.2.2 Putting into operation 1. Check whether the water-heate[...]

  • Page 15

    15 2.2.3 Removing and replacing the inner door (only for the EQ 115/155 models, see Figure 7a). Procedure: 1. Place lip A through the recess on the right and subsequently slide it down behind the steel wall. See to it that both lower lips remain in front of the metal wall. 2. Press lip B through the recess on the left. 3. Subsequently slide lip B b[...]

  • Page 16

    16 recommended to also close the cold water tap and to drain the appliance after cooling (open the drain tap; it is possible to connect a drain hose to the drain tap; open the nearest hot water drain point to prevent air locks). To be able to drain the appliance completely it should be disconnected and tilted slightly in the direction of the drain [...]

  • Page 17

    17 2.6 Setting the nominal heat input The gas control has been factory preset to the water heater nominal heat input. A further check of the burner pressure should be carried out during the commissioning of the unit after installation. The following procedure should be followed. 1. Remove the protruding cover screw on the right side of the gas cont[...]

  • Page 18

    18 G20 G30 G31 Inlet pressure mbar 20 30 37 Burner pressure mbar 10.5 30 37 Diameter main injector mm 3.50 1.95 1.95 Diameter pilot injector mm 2x0.27 0.22 0.22 G20 G30 G31 G20 G30 G31 Inlet pressure mbar 20 30 37 20 30 37 Burner pressure mbar 12.5 30 37 12.5 30 37 Diameter main injector mm 2.35 1.40 1.40 2.60 1.50 1.50 Diameter pilot injector mm 2[...]

  • Page 19

    19 2.8.1 Sacrificial anode The life cycle of the anode is determined by the quality and the quantity of the water flowing through the apparatus. It is therefore recommended that the anode be inspected and replaced if necessary at least once a year. 1. Close the stop cock in the cold water supply pipe, 2. Open the nearest hot water tap in order to a[...]

  • Page 20

    20 2.8.2 Cleaning 1. Close the gas supply and demount the burner after it has cooled down, 2. Disconnect the burner, pilot pipe and thermo couple from the gas control block (see Figure 11), 3. Remove the complete burner assembly, 4. Clean the burner with a soft brush. 5. Check the pilot burner and clean it if so required, 6. Check the combustion ch[...]

  • Page 21

    21 2.10 Fault finding In case of failure the following should be checked. 2.10.1 Safety thermostat All appliances have been fitted with a safety thermostat that shuts off the gas supply when the water temperature is too high. The safety thermostat remains activated until the water temperature drops below the safety temperature. The water heater mus[...]

  • Page 22

    22 3. FOR THE USER 3.1 Commissioning Warning Installing and commissioning (for the first time) of this water heater should only be carried out by a qualified competent heating engineer. 3.1.1 Filling the water heater 1. Close the drain tap. 2. Open the cold water tap to the water heater and open all taps where hot water can be drained for de- aerat[...]

  • Page 23

    23 and tilted slightly in the direction of the drain tap. 3.1.5 Maintenance The inlet combination has to be tested regularly by relieving it (via the relief button). The water has to flow out in a forceful jet. Check whether the discharge pipe is open. We recommend a service agreement on an annual basi s. To be able to order spare parts it is impor[...]

  • Page 24

    Fault Possible cause Corrective action 3.2 Fault finding Blocked pilot burner Blocked chimney Safety thermostat Thermocouple defective Thermocouple makes no contact Gas supply closed Down draught supervision not connected. Temperature is set too low Control knob in position ( ✸ ) (pilot burns ) Control knob in position ( l ) Flue safety device cl[...]

  • Page 25

    Fault Possible cause Corrective action Insufficient hot water, or none at all Water leakage Set the temperature regulator at a lower temperature and reignite the pilot burner. Reduce the consumption of hot water. Allow the appliance time to heat the water. Turn the control button to the ( l ) position. Close the gas tap and inform your installer. S[...]

  • Page 26

    26 4. GUARANTEE The following conditions form the guarantee agreement between A.O. Smith Water Products Company (the warrantor) and the owner of the water heater. 4.1 Guarantee in general If within one year of the original installation date of the water heater any part or component other than the tank shall prove upon examination by the warrantor o[...]

  • Page 27

    27 any other dealer or stockist of the warrantors products. 4.7 No other guarantee or warranty either expressed or implied is made on behalf of A.O. Smith Water Products Company. With respect to the water heater in question further A.O. Smith does not guarantee this water heater as suitable for purpose except within the terms of warranty detailed a[...]

  • Page 28

    28 MODEL: ......................................................................................................................... SERIAL NUMBER: ......................................................................................................... ORIGINAL DATE OF INSTALLATION: ..................................................................[...]

  • Page 29

    29[...]

  • Page 30

    30[...]

  • Page 31

    31[...]

  • Page 32

    32 0307 985 R1[...]