Toshiba Carrier MMD-UP0121VHG-UL Installation, Operation And Maintenance Manual page 16

INSTALLATION-ELECTRIC HEAT
Install Procedure:
To install the electric heater,
1. Disconnect and lock out electrical power from
the unit. Remove heater access panel. Discon-
nect field power wires from the unit power wires.
DANGER! - MAKE SURE there is no voltage
supply to the unit before proceeding!
2. Disconnect and discard 1 harness connector at
the blower deck.
3. Remove blank plate from heater access panel
(covers square hole for breaker style power
switches).
4. Remove SAT sensor and sensor holder from
heater bulkhead and reposition on unit discharge
ductwork routing through auxiliary SAT sensor
hole on top panel.
5. Install SAT 3 feet after the first 90 degree turn
in the discharge ductwork.
6. Remove plate on the heater bulkhead (4
screws).
7. Install heater by carefully supporting the heater
and inserting it into the opening in the heater bulk-
head. NOTE: Make sure to guide the pin into the
hole at the back of the heater shroud. Secure the
heater to the bulkhead with 4 screws.
8. Connect 2 wiring harnesses (male) to the
matching female receptacles in the blower deck.
9. Connect field wiring to the breaker-style power
SWITCH(ES)
HEATER
ACCESS
COVER
PANEL
BOOT
035-000051-002
HEATER
ASSEMBLY
POWER
Fig. 7 — Heater Accessory Removal
(right side and heater access panels
WARNING: Hazardous voltage. Only qualified
personnel must install the electrical service. Dis-
connect and Lock Out all incoming power sources
before connecting to electrical service.
switches on the front of the heater. WARNING! Be
sure to provide the appropriate wire size and
branch circuit protection as required by the unit
nameplate!
10. Install the heater access panel.
11. Install the silicone cover "boot" over the top of
the power switches. This protects them from dust
buildup. The switches may be activated through the
flexible boot material.
12. Mark the nameplate label with the matching
heater kW rating. Label is located on the exterior of
the front top panel.
Fig. 8 — Heater
Accessory
Installed
not shown for clarity)
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DANGER
HEATER
SHROUD
HEATER
BULKHEAD
MMD IOM 1.3 8-15-2023
HEATER
SHROUD
PIN