Danfoss OP-HJZM Installation And Maintenance Manual page 16

Manual
NOTE
Hailguard Installation
16
BC251686497767en-US0801
Sequence of operation – Field wiring
5. If the termination thermostat fails to close,
the fail-safe set on the timer will terminate the
defrost.
6. The defrost heaters are off.
7. The low-pressure control closes when the cut-in
pressure is attained, allows the compressor to
start.
This wiring diagram is for field reference only.
1) Two contactors one for evaporator fan and
other for defrost heater will be needed. No
extra contactors to be provided with the
unit.
1. Identify the hailguard size needed and trim the
hailguard (if needed) based on the table shown
below, cutting with scissors or utility knife
Model Length
in.
HJXM0150-0200
26
LJHM0150-0300
HJXM0200-0300 29
LNYM0400-0500
31
HJXM0350-0400
HRXM0500-0700
46
LRYM0600-0800
HRXM0750-1000 58
2. Remove the screws from the sides and top of
the condenser.
8. When the evaporator coil temperature reaches
23˚F to 30˚F, the fan delay closes and allows the
fan motors to run.
9. The system will now operate in the refrigeration
cycle until another defrost cycle is triggered by
the timer.
2) Fuse F4 for defrost heaters and cable and
Fuse F5 for evaporator fans and cables will
not be supplied with the unit. These will
need to be purchased separately.
3. Lock the hailguard into place by reattaching
the screws. Start on the left side, unrolling the
hailguard before attaching to the right side. Pull
tight as you progress.
Dimensions
Height
mm in. mm
660 19 480
740 22 550
780 27 700
1170 28 720
1470 38 970
4. The hailguard is now attached and will protect
your Optyma Slim condensing unit from hail
and other elements.