HWM-H-IOM (10/14)
Page 20
6. Start-Up
The following conditions must be met before starting the HWM:
T
he toggle switch on the HWM cabinet must be “OFF”.
The system has been charged according to instructions.
Heating elements in the hot water storage tank
are “OFF”.
Temperature of water in hot water storage tank is less than 100°F.
HWM pump is primed and tank water pressure is normal.
Gage manifold set is connected to high and low pressure connections on the compressor
unit.
The storage water heater temperature
,
controller is adjusted to the highest desired water
temperature
,
setting (110°F maximum).
An accurate temperature
,
sensor is connected to the “Water Out” tube of the HWM and
insulated from ambient air temperature
.
The HWM start-up steps are as follows:
1. Turn the H
WM toggle switch to “ON”.
2. Start system running and monitor compressor
discharge pressure and HWM “Water Out”
temperature
,
as water temperature
,
rises.
3. If compressor discharge pressure reaches 475 psig (R-410A) or 350 psig (R-407C) before
desired hot water temperature
,
is achieved, adjust the storage tank temperature
,
controller
setting to turn the compressor off, or (next):
4.
When “Water Out” temperature
,
is achieved (pressure < 475 psig for R-410A or < 350 psig
for R-407C), adjust water storage tank temperature
,
controller to turn compressor unit
“OFF”. Reference Figures 9 and 10.
5. The water storage tank temperature
,
controller setting should be verified by draining some
hot water from the tank and cycling the system again.
