Mitsubishi Electric PAC-IF062B-E - Before Starting the Test Run; Electric Booster and Immersion Heaters; Check the Parts; Installing the FTC Unit

3
1.4 Before starting the test run
Caution:
• Turnonthemainpower switch oftheoutdoorunitmore than 12hours
before starting operation. Starting operation immediately after turning on
the power switch can severely damage the internal parts. Keep the main
power switch turned on during the operation period.
• Inheatingmode,toavoidtheheatemittersbeingdamagedbyexcessive-
lyhotwater, set thetargetowtemperaturetoaminimumof2ºCbelow
themaximumallowabletemperature of alltheheatemitters.For Zone2,
setthetargetowtemperaturetoaminimumof5ºCbelowthemaximum
allowableowtemperatureofalltheheatemittersinZone2circuit.
• Beforestartingoperation,checkthatallprotectivepartsarecorrectlyin-
stalled. Make sure not to get injured by touching high voltage parts.
• Donottouchanyswitchwithwet hands. Theremaybearisktogetan
electric shock.
• Afterstoppingoperation,make sure to waitatleast5minutesbefore
turning off the main power. Otherwise, it may cause breakdown.
1.5 Electric booster and immersion heaters
Warning:
• FTChassignaloutputs for heatershoweveritcannot isolatepowerto
them in the event of overheating. All electrical heaters used on the water
circuit must have.
a) A thermostat to prevent overheating.
b) A non-self resetting thermal mechanism to prevent overheating.
Abbreviations and glossary
Abbreviations/Word Description
Ambient temperature The outdoor temperature
Freeze stat. function Heating to prevent water pipes freezing
ASHP/HP Air source heat pump
COP Coefcient of performance the efciency of the heat pump
Cylinder unit Indoor unvented DHW tank and component plumbing parts
Hydrobox Indoor unit housing the component plumbing parts (NO DHW tank)
DeltaT Difference in temperature between two system locations.
DHW mode Domestic hot water heating mode for showers, sinks, etc
Flow temperature Temperature at which water is delivered to the primary circuit
FTC (Master) Flow temperature controller, the circuit board in charge of controlling the system, master board for multiple outdoor units control
FTC (Slave) Slave board for multiple outdoor units control
Compensation curve mode Space heating incorporating outdoor temperature compensation
Heating mode Space heating through radiators or under oor heating
Cooling mode Space cooling through radiators or under oor cooling
Legionella Bacteria potentially found in plumbing, showers and water tanks that may cause Legionnaires disease
LP mode Legionella prevention mode – a function on systems with tanks to prevent the growth of legionella bacterium
Packaged model Plate heat exchanger (Refrigerant - Water) in the outdoor heat pump unit
Split model Plate heat exchanger (Refrigerant - Water) in the indoor unit
TRV Thermostatic radiator valve – a valve on the entrance or exit of the radiator panel controlling the heat output
1. Safety precautions
2. Installing the FTC unit
2.1. Check the parts (Fig. 2.1.1)
The FTC unit should be supplied with the following parts.
Part name
Wiring
diagram
symbol
Q’ty
PAC-
IF061
PAC-
IF062
PAC-
IF063
PAC-
SIF051
1
FTC (master) unit/FTC (slave) unit
1 1 1 1
2
Liquid refrigerant temp. thermistor
(Lead wire: 5m/Red, Connector: 3p/Yellow)
TH2 1 ─ ─ 1
3
Flow water temp. and Return water
temp. thermistor
(Lead wire: Gray (Flow water temp.),
Black(Return water temp.),
Connector: 4p/Red)
THW1/2
1
(5m/5m)
1
(5m/5m)
1
(1.1m/
1.2m)
1
(5m/5m)
4
Tank temp. thermistor
(Lead wire: 1.8m/Gray, connector: 2p/white)
THW5 ─ ─ 1 ─
5
Main remote controller cable (10 m) 1 1 1 1
6
Main remote controller 1 1 1 ─
7
SD memory card 1 1 1 1
1
2
,
3
,
4 5
6 7
<Fig. 2.1.1>
Master Slave