Vacuum Relief Valves; To Replace Existing Aquastat; Electrical Supply - John Wood JW6 F307 Installation And Operating Manual

1. Locate the slit running the length of the T&P relief valve
insulation.
2. Spread the slit open and fi t the insulation over the T&P
relief valve (see Figure 9). Apply gentle pressure to the
insulation to ensure that it is fully seated on the T&P Relief
Valve. Once seated, secure the insulation with duct tape,
electrical tape, or equivalent.
Important: The insulation and tape must not block the
discharge opening or hinder access to the manual relief lever
(Figure 9). Ensure a discharge pipe is installed into the T&P
valve discharge opening per the instructions in this manual.

Vacuum Relief Valves

A vacuum relief valve, installed in the cold water supply line
above the top of the water heater, shall protect the water
heater against siphoning (loss of water due to loss of supply
pressure). 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 supply 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 latest edition of "Standard For Relief
Valves For Hot Water Supply Systems, ANSI Z21.22/CSA
4.4".

To Replace Existing Aquastat

Honeywell:
1. Turn the off the power to the water heater, and disconnect
wiring from control.
2. Remove front cover of aquastat by loosening the cover
retaining screw.
3. Loosen the two thermowell adapter retainer screws.
4. Slide the now loosened adapter retainer upward, and
remove old aquastat.
5. Insert new aquastat probe into the thermowell until
completely seated inside the thermowell. If the copper
cable of the probe is slack, pull the excess copper cable
into the Aquastat housing, but ensure probe remains fully
seated.
6. Tighten the two thermowell adapter retainer screws.
7. Reinstall aquastat cover and tighten cover retaining screw.
8. Reconnect wiring to control and turn power back on.
White Rodgers
1. Turn the off the power to the water heater and disconnect
wiring from control.
2. Remove front cover of aquastat.
3. Loosen the locking screw holding the aquastat to the
thermowell (screw is behind housing).
4. Slide out the existing aquastat.
** Check to see if new aquastat bulb fi ts snugly into
existing thermowell. If NO, go to step 5, if YES, go to
step 9.
5. If the system is fi lled with water, drain system to a point
below the boiler tapping.
6. Remove old well from water heater tapping.
7. Using pipe sealant or plumber's tape on threads, install
new thermowell and tighten enough to prevent leakage.
8. Fill the system. Do NOT use the case as a handle to tighten
well after aquastat is secured to well.
9. Insert probe into the thermowell until completely seated
inside the thermowell. If the copper cable of the probe
is slack, pull the excess copper cable into the Aquastat
housing, but ensure probe remains fully seated.
10. Tighten the two thermowell adapter locking screws.
11. Reinstall aquastat cover and tighten cover retaining screw.
12. Reconnect wiring to control and turn power back on.

Electrical Supply

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 editions of these codes:
•
"Canadian Electrical Code Part 1 (CSA C22.1)".
•
Any additional local, provincial or national codes.
Wire the control to the burner as shown in the wiring diagrams
supplied with the burner.
If original wire supplied with the heater is to 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 as required by codes.
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