APC UTS6H Specifications download pdf (Page 22)

Conﬁ guration

Warm Air freewatt

PLUS System can be installed in

several different conﬁ gurations as long as installer adheres

to appliance clearances. Typical conﬁ guration is explained

below:

Furnace, HI Module and Honda MCHP: Typical system

conﬁ guration has Honda MCHP next to furnace, MCHP

can be located on other side of return ductwork or

behind furnace, if required. In some cases, MCHP has

been installed on other side of a wall.

freewatt

Transfer Switch and Load Balancing

Transformer: freewatt

transfer switch (FTS) and

load balancing transformer are typically located on wall

behind or next to Honda MCHP unit. Location allows for

short connections between FTS and Honda MCHP and

system controller.

APC Universal Transfer Switch (UTS6H): APC UTS6H

supplied with factory-supplied pig-tail easing unit’s

installation next to Main Electrical Service panel. Pig-

tail connects directly to Main Service Panel and includes

supply and return leads.

Thermostat: Install thermostat in large zone on ﬁ rst

ﬂ oor. Facilitates installation of 10-conductor cable to

system controller.

Heat Rejection System: Water-cooled heat rejection

system (HRS) can be installed on wall besides Warm

Air freewatt

PLUS System with potable water supply

piped through punch-outs in back of HI module.

Cooling water discharge tubing, which should be

capable of delivering 180° F water, should discharge

into appropriate drain. Air-Cooled heat rejection system

must be installed outside within 100' of freewatt

PLUS System with coolant loop piped through punch-

outs on back of HI Module.

Controls

Warm Air freewatt

PLUS System has its own system

control module that monitors and controls operation of

system. Unit is factory-installed on top of HI module and

connects directly to furnace, Honda MCHP, freewatt

Transfer Switch, heat rejection system, thermostat, outdoor

temperature sensor and internet.

Operation

Outline of Warm Air freewatt

PLUS System’s modes of

operation:

Normal Mode

In Normal Mode, system operates on “Call for Heat” as

typical heating system would operate. “Call for Heat”

is initiated by thermostat and sends signal to Honda

MCHP and furnace to provide heat to conditioned

space. When thermostat signals system control module

“Call for Heat” is satisﬁ ed, furnace is signaled to power

OFF and Honda MCHP continues to operate. Control

module continues to monitor room temperature and

allows Honda MCHP to produce power, while delivering

low level of heat to room.

While utility power is present, freewatt

transfer

switch remains closed, allowing power to ﬂ ow through

freewatt

transfer switch from MCHP unit to main

electrical panel. MCHP unit, when operating, will

generate ﬁ xed 1200 watts of power. Power will ﬂ ow

back through freewatt

transfer switch to main utility

panel and back to utility if surplus power is being

generated. Balancing transformer is not used in this

mode.

Virtual Heat Mode

Virtual Heat Mode operates system to provide heat to

conditioned space in anticipation of heat requirement.

freewatt

heating algorithm in system control module

ﬁ rmware monitors room temperature and outdoor

temperature to optimize Honda MCHP’s operation.

Allowing MCHP’s low level of heat to act as ﬁ rst stage

and furnace’s higher levels of heat to act as second and

third stage.

Bypass Mode

Bypass Mode is utilized when Honda MCHP is not

installed or operational. Mode directly connects

thermostat to furnace and only supplies furnace’s heat

to conditioned space. Mode is normally initiated by

installer or homeowner when MCHP is not installed or

operational and home still needs heat. System control

module automatically switches to this mode when

Honda MCHP has fault or error condition, switching

“Call for Heat” to furnace.

Since MCHP will not be operating, no power is

generated and system is high efﬁ ciency home heating

appliance in this mode.

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APC UTS6H Specifications Page 22

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