Bally Refrigerated Boxes Walk-In Service Manual - Manual (Page 6)

6 IM-268S-11 2013 © Bally Refrigerated Boxes, Inc.
ANTI-CONDENSATE HEATER
Replacing anti-condensate heater element around door frame of hinged
Walk-In doors
A. Disconnect the outside power source leading to the door frame light junction box. Open the door 180
degrees. A large piece of cardboard can be used to close off the open doorway until the heater is replaced.
B. Remove the light switch on the exterior of the door panel. Disconnect the heater wire leads by unscrewing
the wire nuts. Remember how the wires are connected so you can attach the proper leads on the new wire.
C. Remove the screws from the door strikes around the door frame. Remove the strikes. See Figure 8.
D. Remove the screws which secure the stepplate. Remove the stepplate.
E. Remove the defective heater element from the door frame and the grooved hardboard at the base of the
frame. Take note of the position of the heater element in the grooved hardboard before removing it. (For
replacement or updated heaters, a new hardboard will be supplied with an installation diagram.)
F. Apply a small bead of silicone caulking around the perimeter of the door frame to retain the new heater
element until the door strikes can be reinstalled.
G. Guide the leads of the new heater element into the switch box containing the light switch. Note: Only heater
wire leads are to protrude into the switch box-- this will prevent premature heater burnout. Press the heater
element firmly into the corner around the perimeter of the door frame. Locate and press the heater
element back into the grooved hardboard exactly the same way it was removed. When the heaters are first
energized, they will contract. If the wire is not pressed into the corners, it could short out by pulling too
tight against the edges of the strikes and sillplate.
H. Replace and secure the stepplate to the Walk-In floor. Replace the door strikes. Be careful not to pinch the
wires when remounting the hardware.
I. Reconnect the new heater element to the heater wire leads. Recaulk the opening in the door frame where the
heater wire passes through into the junction box. This is very important.
J. Re-energize the outside power source to the door frame light junction box. Check for proper operation.
Figure 8