DRAIN LINE
The drain line should be run from the drain
connection, sloping at least 4” vertical drop for
every foot of horizontal distance . A trap outside
the room will allow proper draining throughout the
line. Connection should be made to proper drainage
facilities that comply with local codes and regula-
tions.
In freezers, to prevent drain line freeze up prob-
lems, the line must be heated and insulated. A heat
input of 20 W per foot in a 0°F room and 30 W
per foot in a -20°F room is usually satisfactory.
Once the line has been completed , double check
the slope in the drain pan to ensure proper drainage
(prevention of ice build-up on pan).
PIPING
Refrigerant line sizes are important and are not
necessarily the same size as the connections at the
condensing unit or evaporator. If in doubt refer to
a recognized source. (Manufacturer’s Engineering
Manual, Ashrae Manuals, etc.)
WIRING
Wire system in accordance with local codes and
regulations. A 36” cord is provided for single fan air
defrost models (AD). Multiple fans have a junction
terminal box for conduit connections.
INSTALLATION INSTRUCTIONS (CONT’D)
When fan delay thermostats are installed the fans
may not start up until the coil temperature
reaches approximately 26°F. On initial start up it may
be necessary to bypass (jumper) this control
temporarily until the coil is cold enough.
SYSTEM CHECK
Before Start Up:
1. Ensure wiring is in accordance with codes.
2. Refrigerant lines are properly sized and routed.
3. Thorough leak check, evacuation and dehydration
has been performed.
4. Drain line has been checked for free flow.
After Start Up:
1. Fan has been checked for correct air flow and no
obstructions.
2. Expansion valve superheat has been checked for
proper operation. (Superheat of the coil should be
around 5 to 6°F for a 10°F TD.)
MAINTENANCE
The unit should be periodically inspected for any dirt
or build up on the fin surface and cleaned if
necessary with a soft whisk or brush.
The fan motor is permanently lubricated and should
not require service.
TTL
60Hz
System
Model Number
Date of Start-Up
Serial Number
Service Contractor
Refrigerant
Phone
Electrical Supply
PROJECT INFORMATION
23/06/17
T30-TTL-PDI-16
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