Carrier 30HH - Manual (Page 19)

INSTALLATION
30HH,HJ
TIME
Fig. 25 - Dehydration Puii-Down Curve
one turn to allow pressure to reach the
gages.
4. Open the liquid line shut-off valves at the
condensers (30HH if using the vapor charg­
ing method - see "Charge With Refriger­
ant”) or the inlet, outlet, and vent valves on
the receivers (30HJ).
5. Open the valves to the capillaries of the
water regulating valves (when used).
6. Fill the chilled liquid circuit completely
with clean water or other non-corrosive
fluids to be cooled. Bleed all air out of the
high points of the system.
7. If the condenser is cooled by waste water,
open the water supply valve. If it is cooled
by a cooling tower, fill the tower with water.
8. Start the air handling equipment or other
equipment to which the 30HH or HJ is con­
nected.
lay and remove protective paper between
contacts of the balancing relay in the step
controller.
Start Up
Upon completing the initial check, charge the
unit with refrigerant. (See "Charge with Refrig­
erant.”)
IMPORTANT: 30HH015,020 units are
fully charged at factory.
The unit should only be started under the super­
vision of a refrigeration mechanic who is famil­
iar
with the accepted operating practices for
refrigeration systems.
1. Open all compressor or system valves that
may have been closed during or after charg­
ing.
2. Start the unit by pushing the "START" and
"STOP” button.
9. Set the temperature controller (page 24).
10. Check tightness of all electrical connec­
tions.
11. Remove cardboard spacer from recycle re -
3. Check all controls for proper operation. (See
"Check Controls.”)
4. Adjust watfer regulating valve to the most
economical pressure for the locality. Nor­
mally 200 to 230 pounds for F 22.
19