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MULTI V 5 Outdoor Unit Drain Pan Heater Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Drain pan heater is an optional accessory (sold separately) for Multi V
TM
5 Outdoor Units (ODUs). The heater is for use on both heat pump
and heat recovery systems. Drain pan heater is available in the following configurations:
6.0 Ton Multi V 5 ODU
• 208/240V - 498W
• 460V—633W
8.0 - 20.0 Ton Multi V 5 ODU
• 208/240V - 599W
• 460V - 761W
Control sequence for the drain pan heater function
Function (Fn23) informs the master outdoor unit microprocessor that an optional drain pan heater is installed in the outdoor unit. Selecting to
engage this option can only be done if a properly sized heater is in place to keep the bottom surface of the outdoor unit >32°F.
The microprocessor will power outdoor unit PCB terminal “CN25_Basepan Heater” when at least one (1) compressor in the frame is operat-
ing, the outdoor air temperature is <39ºF, and either the following conditions occur:
1. Outdoor unit is operating in heating.
2. Outdoor unit is in defrost.
The controller will shut off drain pan heating operation when the outdoor air temperature rises >39ºF, or when all compressors stop operating.
Heater element paths for 6.0 Ton and 8.0 - 20.0 Ton ODUs
Figure 1: Heater Element path for 6 Ton ODU.
DRAIN PAN HEATER CONFIGURATIONS
Figure 2: Heater Element path for 8 - 20 Ton ODU.
Heater Element path.
(ODU Bottom View)
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