22 SXIH-SVX01C-EN
Installation
Hydronic Coil Installation
Reference Figure 10, p. 22 and follow the procedure below to install the hydronic coil.
1. Remove the front grill, filters, two upper frame screws, and two lower frame screws.
2. Install the hydronic coil in the space previously occupied by the grill.
3. Use the frame screws and one of the grill screws to clamp the coil end supports between the
unit frame and the mounting brackets (supplied with the coil).
4. Slide the filters in the filter rack from either end of the coil.
5. Adjust the filter rack for 2-inch filters by removing the upper and lower filter support brackets.
6. The hydronic coil can be installed for either right or left-hand connections. However, steam coils
must have the condensate lines connected to the bottom outlet, with the top outlet capped.
7. A heating coil control relay is factory provided to use with BAY28X182 and BAY28X183
thermostats. Drill two 5/32" holes 7/16" apart and mount the relay in the unit control box as
shown in the detail drawing below. Use a 6-32X.31 screw (not included) to mount the relay.
Connect wiring in accordance with the thermostat wiring diagram.
Figure 10. Hydronic coil installation
RC Y1Y1 Y2Y2 G
Y2
Y2Y1Y1C G R
21 3
3
1 2
LITTLEFUSE
600V (CS A)
FLQ 1/10
500V (UL)
FUSE 1 A
SR T
GND
GND
HVT
LVT
C4 C1C2C3 TR4TR3TR1 TR2
TNS
FC1
RELAY
MOUNTING BRACKET (5)
FRAME SCREW (5)
FILTER SUPPORT BRACKET (2)
FILTER RACK
CENTER MOUNTING BRACKET
(USE GRILL MOUTING SCREW ON
5, 7.5, 10, & 15-TON UNITS)
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