Unitary products group 2CE Series, 2FB04700846, 2CE04510525, 2FB04700825, 2CE04510725 Installation Instructions Manual
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035-19457-000-B-0403
ACCESSORY KIT INSTALLATION INSTRUCTIONS
FUSE BLOCK ACCESSORY
MODELS 2FB04700825 & 2FB04700846 (SERIES “2CE” ELECTRIC HEATERS)
FOR SINGLE PACKAGE AIR CONDITIONERS 3 THRU 6 TON
SINGLE PACKAGE HEAT PUMPS 3 THRU 5 TON
GENERAL
The following instruction provides all the necessary information for field assembling a fuse block accessory on the air
conditioners and heat pumps listed above.
Heaters with 575 voltages do not have fuse boxes. (Not
required by CSA nor any Canadian local codes.)
INSTALLATION
When required by local code (Chicago), these fuse block
accessorie s are used in conjunc tion with the speci fic elec tric
heat accessory listed in Table 1 plus the equivalent heating
option if factory installed.
TABLE 1: ACCESSORY APPLICATION
Fuse Block
Accessory
Model
2FB04700825
2FB04700846
The following heaters include a fuse box as standard equipment:
• all 208/230-1-60 heaters
• all 208/230-3-60 heaters above 8KW
CONTROL
CONTACTOR
ELECTRIC HEATER
MODEL VOLTAGE
2CE04510525
2CE04510725
2CE04510746
2CE04511046
2CE04511546
2CE04512046
2CE04513046
UNIT
BOX
1M
208/230-3-60
460-3-60
BLOWER
SECTION
INSTALLATION FOR DCE/DHE/DEE/DHC/DHB 036
THRU 076 PACKAGED COOLING UNITS AND
BCH/BCB 036 THRU 060 PACKAGED HEAT
PUMPS.
Install the fuse block accessories as follows:
NOTE: Most of the following installation procedures are
duplicates of the electric heater accessory installation procedures. Refer to “For Heaters With A
Fuse Box” section in the installation instruction.
1. Disconnect all electrical power to the unit.
2. Remove the following panels from the basic unit.
• Heating access panel
• Heater control box cover
• Blower access panel
• Unit control box access panel
ELECTRIC HEAT
SECTION
HEATER
CONTROL
BOX
2TB
TERMINAL
BLOCK
FIELD
POWER
WIRING
FUSE BOX
FUSE BLOCK
AND
FUSES
ELECTRIC HEATER
WIRING
FIGURE 1 - TYPICAL FUSE BLOCK INSTALLATION FOR DCE/DHE/DEE/DHC/DHB 036 THRU 076 PACK-
AGED COOLING UNITS AND BCH/BCB 036 THRU 060 PACKAGED HEAT PUMPS
Unitary Products Group
035-19457-000-B-0403
FIELD
POWER
WIRING
MAIN
DISCONNECT
OR
TERMINAL
BLOCK
1M
CONTACTOR
UNIT
CONTROL
BOX
FUSE BOX
BLOWER
SECTION
FUSE BLOCK
AND
FUSES
ELECTRIC HEAT
SECTION
ELECTRIC HEATER
WIRING
HEATER
CONTROL
BOX
FIGURE 2 - TYPICAL FUSE BLOCK INSTALLATION FOR DM/DF/DH 036 THRU 076, DL/DS/DU -03 THRU
-A6 PACKAGED COOLING UNITS AND BQ 036 THRU 060, BB -03 THRU -05 PACKAGED HEAT
PUMPS.
NOTE: Motor leads are held to the blower by plastic ties.
Do not disturb the ties.
3. Remove the 1-3/4” knockout from the right hand side of
the unit’s ma in cont rol box. I nse rt the p lastic bu sh ing pro vided into the knoc kout ho le from the b lower sec tion side
of the control box. The retaining collar on the bushing
MUST be on the blower sid e of the contro l box for prop er
fuse box fit-up.
4. Mount the fuse b ox (c onta ining the f use b lock and fu ses)
inside the blower section. Attach the upper left hand
flange on the fuse box to the back of the main control
box with one screw provided.The mounting hole is
located above the 1RC ca pacito r . Attac h the bottom rig ht
hand flange on the fuse box to the unit 1 base, at the
holes provided, with two screws.See Figure 1.
NOTE: If insulation grip nail fasteners on the base of the
blower section interfere with proper mounting of
the fuse box, they should be broken off.
5. Open the hinged fuse box cover to gain access to the
inside. Insert the three power leads from the heater harness through the hole in the right-hand side of the fuse
box and through the cable connector.This connector is
supplied with the heater kit to secure the po wer leads to
the fuse box. Position connector so that the connector
nut is located on t he out sid e of th e fuse bo x. T i ghten nut.
NOTE: Wrap leads with a minimum of 3 layers of tap e
where they come in contact with the connector.
DO NOT tighten the conne ctor clamp screw s unt il
the leads are connected and in place.
6. Insert the three (3) power lead s from one si de of the fus e
block to the top terminals of the terminal block (2TB)
through the bushing installed in Step 3. Connect the
three (3) power leads from the heater harness in Step 5
to the opposite sid e of the fus e b loc k. Refer to the wiring
labels inside of the fuse box cover for proper wiring connections.
7. Adjust all wires for the proper slack, now tighten the
screws on the connector clamp to secure in position.
8. Connect the field p ow er wiri ng to the bottom terminals o f
the terminal block (2TB).
Exercise care when secur ing the fuse box i n position to make sure tha t the ev apo rato r low t em pera ture sensor control leads are not pinched or cut. If
leads must be routed away from sheet metal
edges, visually check the control to insure its loca-
9. Close fuse box cover, replace cover on the heater control box and re-install the unit panels that were removed
in Step 2.
10. Reconnect power to the unit.
tion has not been disturbed.
Unitary Products Group 2
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