FERGUSON.COM/PROSELECT
Distributed Exclusively by Ferguson and Wolseley Canada
©2021 Ferguson Enterprises, LLC 0621 2944469
PSW12414 / PSW12415
1
PLANNING THE INSTALLATION
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property damage.
Follow these warnings exactly:
1. Plan the installation as outlined below.
2. Plan for frequent maintenance as described in the
maintenance section.
3. Review the following conditions that can apply to your specific
installation and take the precautionary steps provided.
Frequent Cycling
These controls are designed for use on appliances that typically cycle three
to five times a day. In year-round applications with greater cycling rates of
10,000 cycles annually, the control can wear out more quickly. Perform a
monthly checkout.
Water or Steam Cleaning
If a control gets submerged in water, replace it. If the appliance is likely to be
cleaned with water or steam, protect (cover) the control and wiring from water
or steam flow. Mount the control high enough above the bottom of the cabinet
so it does not get wet during normal cleaning procedures.
High Humidity or Dripping Water
Dripping water can cause the control to fail. Never install an appliance where
water can drip on the control. In addition, high ambient humidity can cause the
control to corrode and fail. If the appliance is in a humid atmosphere, make
sure air circulation around the control is adequate to prevent condensation.
Also, regularly check out the system.
Corrosive Chemicals
Corrosive chemicals can attack the control, eventually causing a failure.
If chemicals are used for routine cleaning, avoid contact with the control.
Where chemicals are suspended in air, as in some industrial or agricultural
applications, protect the control with a cover.
Dust or Grease Accumulation
Heavy accumulations of dust or grease can cause the control to malfunction.
Where dust or grease can be a problem, provide covers for the control to
limit contamination.
Heat
Excessively high temperatures can damage the control. Make sure the
maximum ambient temperature at the control does not exceed the rating of
the control. If the appliance operates at very high temperatures, use insulation,
shielding and air circulation, as necessary, to protect the control. Proper
insulation or shielding should be provided by the appliance manufacturer.
Verify proper air circulation is maintained when the appliance is installed.
Flow Capacity & Pressure Drop
Fig. 1 shows the typical flow (kBTU/hr) vs pressure drop (in. w.c.) curve
for natural gas and LP gas. Actual pressure drop depends on the internal
configuration of the valve. Table 1 shows the pressure drop at various flows
for the control.
Fig. 1: Typical capacity curve for family water heater control system.
Gas Type
Flow (kBTU/hr)
Pressure Drop
(in. w.c.)
NG
30
50
75
1.43
1.47
1.54
LP
30
50
75
0.91
0.94
0.97
Table 1: Gas capacity conversion
INSTALLATION
When Installing This Product…
1. Read these instructions carefully. Failure to follow them could damage the
product or cause a hazardous condition.
2. Check the ratings given in the instructions and on the product to make sure
the product is suitable for your application.
3. Installer must be a trained, experienced service technician.
4. After installation is complete, check out product operation as provided in
these instructions.
!
100
90
80
70
60
50
40
30
20
10
0
0.8 0.0 1.0 1.1 1.2 1.3
Flow
(KBTU/HR)
Capacity Date
Water Heater Controls
Installation Instructions
