Carrier 48HC Gas Heater User Manual


 
50
Economizer 2 Position Damper
Unit Without Economizer or
2 Position Damper
C10645
Fig. 76 -- EconoMi$ert IV Wiring
Step 13 — Adjust Factory--Installed Options
EconoMi$er IV Occupancy Switch
Refer to Fig. 76 for general EconoMi$er IV wiring.
External occupancy control is managed through a
connection on the Central Terminal Board.
If external occupancy control is desired, connect a time
clock or remotely controlled switch (closed for Occupied,
open for Unoccupied sequence) at terminals marked
OCCUPANCY on CTB. Remove or cut jumper JMP 2 to
complete the installation.
Step 14 — Install Accessories
Available accessories include:
Roof Curb
Thru--base connection kit (must be installed before unit
is set on curb)
LP conversion kit
Manual outside air damper
High Altitude Gas kits
Low Ambient Controls
Thermostat / Sensors
Two--Position motorized outside air damper
EconoMi$er2 (without control/for external signal and
integrated barometric relief)
EconoMi$er IV (with control and integrated barometric
relief)
Power Exhaust
Differential dry--bulb sensor (EconoMi$er IV)
Outdoor enthalpy sensor
Differential enthalpy sensor
CO
2
sensor
DDC interface (PremierLink)
Louvered hail guard
Phase monitor control
Winter Start kit
Refer to separate installation instructions for information
on installing these accessories.
Pre--Start and Start--Up
This completes the mechanical installation of the unit.
Refer to the unit’s Service and Maintenance manual for
detailed Pre--Start and Start--up instructions.
48HC