BREECH | COLD WATER | |
HOT WATER CONNECTION | ||
| ||
OUTLET |
| |
NIPPLE | TOP | |
| ||
T&P VALVE |
|
AQUASTAT
TEMPERATURE
CONTROL
DRIP TUBE
DRAIN
VALVE
CENTER OF
BLAST TUBE
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 | |
| |
FLUE COLLAR |
|
CAPPED FOR REAR |
|
FLUE USE (OPTIONAL) |
|
| T&P VALVE |
AQUASTAT
TEMPERATURE
CONTROL
COLD INLET AND
DRAIN VALVE
COMBINATION
CENTER OF
BLAST TUBE
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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