GSW JW327 JWF507, JW717 Vacuum Relief Valves, Installation Of The Aquastat Temperature Control

• “National Electrical Code, ANSI/NFPA 70”, (USA).

• Any additional local, provincial, national or state codes. Wiring must be N.E.C. Class 1. If original wire supplied with heater must be replaced, type 105°C wire or equivalent must be used. Supply wiring to heater and additional control wiring must be 14 ga. or heavier. Provide an electrical ground at heater as required by codes.

BREECH	COLD WATER
	SHUT-OFF
HOT WATER CONNECTION
OUTLET
NIPPLE	TOP
T&P VALVE

AQUASTAT

TEMPERATURE

CONTROL

DRIP TUBE

DRAIN

VALVE

CENTER OF

BLAST TUBE

NON-COMBUSTIBLE

FLOOR

150TO 305mm

6 TO 12”

Figure 7 PLUMBING CONNECTIONS

(CENTER FLUE)

up of lime in the T&P valve, there are two recommendations:

1.Install a pressure relief (only) valve in the cold water supply line. Make sure that the discharge of this valve is directed to a drain and it is protected from freezing.

or:

2.Install an expansion tank on the cold water supply line. For every 50 gallons of stored water, the expansion tank must have a minimum capacity of 1.5 gallons.

Vacuum Relief Valves

Water heaters shall be protected against loss of water from siphoning due to loss of supply pressure by a vacuum relief valve installed in the cold water supply line at a level above the top of the water heater. Where heating equipment has a bottom supply, the cold water supply piping shall be carried above the top of the heater before being routed to the sup- ply connection and have a vacuum relief valve installed in it at a level above the top of the storage tank. The vacuum relief valve shall be in compliance with the standard ANSI Z21.22 (latest issue).

Installation Of The Aquastat

(Temperature Control)

HOT WATER	VACUUM BREAKER COLD WATER
OUTLET	SHUT-OFF
FLUE COLLAR
CAPPED FOR REAR
FLUE USE (OPTIONAL)
	T&P VALVE

AQUASTAT

TEMPERATURE

CONTROL

COLD INLET AND

DRAIN VALVE

COMBINATION

CENTER OF

BLAST TUBE

NON-COMBUSTIBLE

FLOOR150 TO 305mm 6 TO 12”

Figure 8 PLUMBING CONNECTIONS (CENTER/REAR FLUE)

required, proceed as follows:

1.Locate the aquastat well opening in the front of the heater.

2.Apply a good grade of pipe joint compound to the threads on the well.

3.Install the well in the tank opening, tighten firmly to ensure there are no leaks.

4.Insert the sensing bulb of the aquastat into the well and secure the aquastat to the well using the screw provid- ed.

5.Wire the control to the burner as shown in the wiring dia- grams (Figures 9, 10 & 11).

Electrical Supply Connections

General wiring requirements:

Electric shock hazard. Can cause severe personal injury or death if power source, including service switch on heater, is not disconnected before installing or servicing. Installations must comply with the latest edition these codes:

•“Canadian Electrical Code Part 1 (CSA C22.1)” (Canada).

This heater operates automatically under the control of the aquastat, which responds to the demand of hot water. Depending on the model, the aquastat, well and wiring is either installed on the heater, or included in the carton con- taining the burner. If the installation of the aquastat is

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