Electric Heat Kit Installation Manual
Table Of Contents
- Electric Heat Kit
- Table of Contents
- CHECK LIST AFTER INSTALLATION
- Dimensions
- 1. Electric Heat Kit Models
- 2. Electric Heat Kit Accessories
- 3. Safety precautions
- 4. Installing the Electric Heat Kit
- 4.1 Read the safety precautions section of the Multi-Position Air Handler before installing the electric heat option.
- 4.2 Setting proper external static pressure.
- 4.3 Enabling Electric Heat
- 4.4 Operation Mode
- 4.5 Attaching the enclosure to the Air Handler
- 4.6 Proper Support in the Horizontal Position for the Multi-Position Air Handler with Electric Heat Kit:
- 4.7 Rotating circuit breaker orientation for Horizontal Left Installations:
- 5. Electrical Schematics
PVFY-A·NAMU-E1, PVA-A·AA7, MVZ-A·AA7 and SVZ-KP-NA Models:
The operation of the electric heat kit is shown in the table below
. See the indoor unit service manuals for more information.
8.5 Electric Heater Control
•
Mode Change
Condition
(T
O
-T
RA
)
> 2.7 °F[1.5 °C]
AND
T
RA
has not
increased by
0.9 °F [0.5°C]
in X min
EH1 ON for
> Y min
AND (T
O
-T
RA
)
> 2.7 °F [1.5 °C]
AND
T
RA
has not
increased by
0.9 °F [0.5°C]
in Y min
(T
O
-T
RA
)
< 0.9 °F [0.5°C]
EH1 ON ● AND ●
EH2 ON ● AND ● AND ●
EH1 OFF ●
EH2 OFF ●
KEY
• EH1: Electric Heater 1
• EH2: Electric Heater 2
• T
O
: Set point temperature
• T
RA
: Return Air temperature
• X: Time delay (Selectable. See the indoor unit service manuals for more information.)
• Y: Time delay (Non-Selectable. See the indoor unit service manuals for more information)
1
The gure below shows an example of electric heater operation. See the indoor unit service manuals for more information.
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min X min X min
①
②
③
④
⑤
⑥
①
②
③
> 7
min
Step Condition Result
(To -T
RA
) > 2.7 °F [1.5 °C] AND T
RA
has not increased by 0.9 °F [0.5°C] in X min EH1 ON
(To -T
RA
) < 2.7 °F [1.5 °C] AND T
RA
increasing faster than 0.9 °F [0.5°C] in Y min EH2 not ON
(To -T
RA
) < 0.9 °F [0.5°C] EH1 OFF
(To -T
RA
) > 2.7 °F [1.5 °C] AND T
RA
has not increased by 0.9 °F [0.5°C] in X min EH1 ON
(To -T
RA
) > 2.7 °F [1.5 °C] AND T
RA
not increasing faster than 0.9 °F [0.5°C] in Y min EH2 ON
(To -T
RA
) < 0.9 °F [0.5 °C]
EH1 OFF
EH2 OFF
Y
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min
X min X min
①
②
③
④
⑤
⑥
①
②
③
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min
X min X min
①
②
③
④
⑤
⑥
①
②
③
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min X min
X min
①
②
③
④
⑤
⑥
①
②
③
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min
X min
X min
①
②
③
④
⑤
⑥
①
②
③
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min
X min
X min
①
②
③
④
⑤
⑥
①
②
③
EH2
ON
OFF
T
o
- 0.9 °F [0.5 °C]
T
o
- 2.7 °F [1.5 °C]
ON
OFF
EH1
T
o
T
RA
X min
X min
X min
①
②
③
④
⑤
⑥
①
②
③
Electric Heat Kit
Specifications are subject to change without notice. 17 © 2018 Mitsubishi Electric US, Inc.