ECR RetroAire R90C Installation, operation & maintenance manual - page 12
INSTALLATION INSTRUCTIONS — R90C | R90H
7.
Connecting (optional) hydronic coil controls
— If
hydronic heat option has been ordered, hydronic coils
will need to be field installed on new unit.
A. Hydronic coils are not factory installed and need to
be ordered.
B. Coil with old unit can be located in subbase, under
or above chassis in special attachment. It is
necessary to know where coil is to be located and
physical size of coil if ordered for replacement.
New coil should be installed in same manner as coil
it is replacing.
C. Remove 2-position connector assembly from kit
bag supplied with unit (2 yellow wires attached).
D. Connect 2-position connector to 2-position
connection located on bottom of control box panel.
8.
Field install (optional) Aquastat
A. Remove black jumper wire located on bottom panel
of control box (also terminated with 2-position
connector).
B. Cut jumper wire in middle and splice Aquastat to jumper.
C. Place connector back into original location. Refer to
wiring diagram on unit for details.
9.
Secure chassis
• Verify all seals are properly located.
• Verify correct baffles are attached to condenser coil,
and properly orientated.
• Slide unit into final position and tighten tie down
bolts or screws.
10.
Install control section
• Remove front cover of unit.
• Unit mount installation, take the thermal bulb from
control section and run the capillary tube bulb along
unit to blower section. There will be no thermostat
bulb if remote thermostat option is used.
• Looking at sides of blower housing, there are two
clips that support thermal bulb. Remove screws hold-
ing clips. Slide thermal bulb into clips. Fasten clips
back into place, making sure to not kink the bulb.
• After thermostat is in place, mount control box in the
cabinet in same location as old control box.
• Replace front cover of unit and finish installation.
11.
Hard-wired units —
If unit is hard wired, follow
instructions on pages 38-40 to verify existing wiring
and over current protection.
A. Remove line cord wires from PTAC/PTHP power
entrance terminals.
B. Route power supply wiring through strain-relief
bushing and connect leads to power entrance
terminals.
C. Secure strain-relief clamp. If wiring is through
conduit, insert conduit through control box
knockout and secure in place.
D. DO NOT turn on power until completing instructions
in "Inspection and Startup" on page 16.
12.
Do Not Plug Line Cord In, If In Used Condition
.
Follow instructions in "Inspection and Startup" on page 16.
The Right Fit for Comfort
12
P/N 240010330, Rev. A [10/15/2013]