11
SPECTRA COMMERCIAL AND RESIDENTIAL INSTALLATION GUIDE
Water Tank Refill
Steps:
1)
Close water heater drain valve.
2)
Open cold water supply to tank.
3)
Open hot water faucet in house to bleed air from system then close when full.
4)
Depress handle on pressure relief valve to bleed any remaining air from tank, then
close.
5)
If so equipped, unscrew indicator plug on motor end of pump (note commercial units
pump exterior) until all air is purged from pump. Tighten plug. Use vent couplings to
bleed air from lines.
6)
Carefully inspect all plumbing for water leaks. Correct as required.
7)
Before restoring electrical or fuel supply at water heater, adjust temperature setting
on tank.
• On tanks with both upper and lower elements, the lower element should be turned
down to the lowest setting, approximately 100
°
F. The upper element should be
adjusted to 130
°
F. Depending upon the specific needs of the customer, you may
want to adjust the upper element differently.
• On tanks with a single element, lower the thermostat setting to 120
°
F.
8)
After thermostat adjustments are completed, replace access cover and restore
electrical or fuel supply to water heater.
Steps:
1)
Make sure any valves in desuperheater water circulating circuit are open. Never
operate the DHW circulating pump dry.
2)
Turn on Spectra unit to first stage heat.
3)
DHW pump should be running. Be sure DHW pump disable switch (SW1 #2) is ON
(refers to commercial microprocessor only).
4)
The temperature difference between water entering and leaving the desuperheater
should be 5
°
to 15
°
F. The water flow should be approximately 0.4 gpm per ton of
nominal cooling.
5)
Allow unit to heat water 15 to 20 minutes to be sure operation is normal.
6)
When the pump is first started, allow the pump to run for at least 5 minutes to insure
water has filled the circulator properly.
Desuperheater Note:
When servicing a unit’s refrigeration circuit, it is always good practice to disable the
desuperheater pump. This can be accomplished by using the DHW pump disable switch
(SW1 #2), on the commercial microprocessor with an electronic unit, remove the orange
wire lead from the "A" terminal on the power strip. Do not run DHW pump dry. If the unit is
placed in operation before the desuperheater piping is connected, be sure the pump switch
is set to the "OFF" position.
General
Be sure the available power is the same voltage and phase as that shown on the unit
serial plate. Line and low voltage wiring must be done in accordance with local codes or the
National Electric Code, whichever is applicable.
Unit Power Connection
Line voltage connection is made by connecting the incoming line voltage wires to the “L”
side of the contactor as shown in Figure 12 on page 12. Consult the UNIT ELECTRICAL
DATA on page 13 for correct fuse size.
Initial
Desuperheater
Start Up
Electrical
Connections
