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MQTHI5 Single Duct Terminal Units
with Electric Heat
Electric shock hazard . Can cause personal injury or
equipment damage .
This equipment must be properly grounded. Connections and
service to the MicroTech III Chiller Unit Controller must be
performed only by personnel knowledgeable in the operation
of the equipment being controlled.
• Always inspect the electric coils for damage prior to
installing the single duct unit.
• All electric heaters if provided by Daikin are balanced
by kW per stage. The installing electrician should rotate
these heater stages by phase in order to help balance the
building electric load.
• See above wiring instructions.
• The "up" orientation must be followed.
MQTHI5 Single Duct Terminal Units
with Hot Water Coils
• Always inspect the hot water coils for damage prior to
installing the single duct unit.
• CAUTION: The copper tubing should not be used as lift
points.
• The hot water coil casing is field insulated.
• The hot water coils do not have a drip pan and are not
suitable for use as cooling coils.
Controls
Static sensitive components . Can cause equipment
damage .
Discharge any static electrical charge by touching the bare
metal inside the control panel before performing any service
work. Never unplug cables, circuit board terminal blocks, or
power plugs while power is applied to the panel.
IMPORTANT
Units with digital controls, if factory programmed, incorporate
specific communication addresses. Installing the terminal in a
different location than noted on unit label and building plans
may result in excessive start-up labor.
Detailed information regarding connection, start-up and
operating procedures for controls provided by Daikin
are available from your local Daikin representative. For
information on controls by other manufacturers, contact that
manufacturer's local branch or dealer.
IM 1093-1 • SINGLE DUCT VAV TERMINALS
DANGER
CAUTION
Labeling
MQTHI5 Single Duct Air Terminals are shipped from the factory
with up to seven different information labels (not all labels
pertain to all single duct units depending upon the type of
insulation and the final ship to state).
1. Control Label – affixed to the single duct terminal casing.
Shows piping/wiring diagram and control sequence
number and fusing (if applicable).
2. Calibration Label – affixed to the single duct terminal
casing. Shows air flow calibration data and control
settings (if applicable).
3. I.D. Label – affixed to the single duct terminal casing.
Shows tagging information, customer order number, ETL
Logo, etc.
4. AHRI Certification Label on Single Duct Terminal Unit –
identifies applicable industry test standard and certifies
unit is in compliance.
5. AHRI Certification Label on Hot Water Coils – identifies
applicable industry test standard and certifies hot water
coil compliance (if hot water coils is ordered as an
accessory).
6. Fiberglass Label – identifies insulation type for units
shipped to California.
7. Orientation label – identifies the proper air flow direction
and the top of the unit.
MQTHI5 Flow Sensor
MQTHI5 Single Duct Air Terminals are shipped with a factory-
installed pressure differential flow sensor installed. See Figure
3, for the calibration curve.
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