APC UTS6H Specifications download pdf (Page 23)

Domestic Hot Water (DHW) Boost Mode (WDJ Only)

DHW Boost Mode activates Honda MCHP unit to

heat water at same time as water heater burner, if

freewatt

PLUS System is not already operating in

space-heating mode.

DHW Auto Heat Mode (WDJ Only)

If Honda MCHP unit is not satisfying any normal calls

for heat, freewatt

PLUS System will activate DHW

Auto Heat Mode. Mode activates Honda MCHP unit

to heat water before water heater would activate,

maximizing use of fuel through Honda MCHP unit.

Smaller use of water and water heater standby losses

do not lower tank temperature enough to activate

water heater’s burner.

Post-Run Mode

If Honda MCHP has been started in Back-Up Power or

Grid Boost Modes and has not operated for minimum

of 30 minutes, freewatt

PLUS System will restart

MCHP unit in normal operation and operate unit until it

reaches 30 minutes of runtime.

Grid Boost Mode

If Owner and Electric Utility have signed agreement,

Electric Utility can send remote command to initiate

freewatt

PLUS System to operate Grid Boost Mode

and generate power in distributed generation mode.

Power will ﬂ ow same way as Normal Mode, except

Boost Mode temporarily increases power output from

ﬁ xed 1200 watts to ﬁ xed 1800 watts. Higher power

output optimizes beneﬁ t of freewatt

PLUS System

and is useful for utility demand/response energy

programs. Balancing transformer is not used in this

mode.

Back-Up Mode

When utility power is not present, freewatt

Transfer

Switch will automatically open and deliver MCHP unit’s

240 VAC power into load balancing transformer to

create 120 VAC. 120 VAC power will be delivered

to APC Universal Transfer Switch (UTS6H) and unit

will load manage back-up loads. freewatt

Transfer

Switch, freewatt

control module, MCHP unit and APC

UTS will monitor state of utility grid, while initiating

backup power sequence.

MCHP unit starts up in backup power mode and delivers

240VAC variable output power, up to maximum of

1800 watts to freewatt

Transfer Switch. freewatt

Transfer Switch will divert 240 VAC power to load

balancing transformer to convert MCHP unit’s 240VAC

power to 120 VAC power compatible with loads on APC

UTS.

MCHP unit will continue to operate in Back-up Mode

until freewatt

Transfer Switch senses return of utility

power. freewatt

control module will safely command

freewatt

Transfer Switch to re-close to utility power

after MCHP unit ceases backup mode operation, and

system will subsequently return to Normal Mode.

Communications

Warm Air freewatt

PLUS System uses several levels of

communication to allow homeowner, service technician and

dealer to monitor and control system’s operation. Several

levels of communication allow system to be properly

commissioned, operated, monitored and serviced to ensure

proper operation.

First level is LED lights found on front of HI module.

Signal homeowner or service technician status of

operation and error mode.

Second level is freewatt

PLUS thermostat.

Thermostat is latest generation of programmable

communicating thermostat combines advanced digital

technology with new easy user interface. Scroll wheel

allows homeowner multiple levels of programming and

menus to display operating information. Thermostat

displays MCHP runtime and outdoor temperature on

scrolling line at top as well as system error messages.

Third level available for service technician involves

laptop computer connected to system control module

for diagnostic troubleshooting. freewatt

PLUS MINT

tool, proprietary software program, queries system

control module for status information, operating

characteristics and error codes as well as allowing

manual control of system for troubleshooting activities.

Fourth level is embedded webpage on system control

module. When Warm Air freewatt

PLUS System is

installed, connect system control module to local area

network. Allowing homeowner to access webpage on

system control module, monitor system operation and

modify thermostat settings.

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APC UTS6H Specifications Page 23

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