TREND HT-D User Manual
Duct Humidity and Temperature Sensors
Important: Retain these instructions
1 Unpacking
2 INSTALLATION
Installation Instructions
HT/D
HT/D Installation Instructions
TG200988
1
2
c
Dimensions
33 mm (1.3”)
Location
electronics
-5 °C
(23 °F)
-20 °C
(-4 °F)
0 °C
(32 °F)
V > 10 m/s, 33’/s
+50 °C
(122 °F)
+60 °C probe
(140 °F)
+40 °C measurement
(104 °F)
12 mm diam (0.47”)
263 mm (10.35”)
ba
HO
2
Protection :IP65
M16 gland
0 %RH
100 %RH
non-condensing
97 mm (3.82”)
H T / D
T r e n d C o n t r o l S y s t e m s
94 mm (3.7”)
H o r s h a m , U K
105 mm (4.31”)_
85 mm (3.35”) centres57 mm (2.74”)
Prepare duct
3
either for screwing directly to duct
Ø 15 mm (0.59”)
a
42.5 mm
(1.67”)
b
2 pilot holes
42.5 mm
(1.67”)
c
or for using optional mounting flange
a c
4 holes Ø 4 mm (0.16”)
HT/D Duct Humidity and Temperature Sensors Installation Instructions TG200988 Issue 1/A 30/01/08
45 mm
(1.77”)
Ø circle
Ø 23 mm
(0.91”)
e
b
foam washer
f
d
1
HT/D Installation Instructions
2 INSTALLATION (Continued)
Remove lid
4 5
a
b
Wire to Controller
7
HT/D
Remove Connector
I-P
I-N
TH
TH
Insert cable through gland
6
either use
flexible
conduit
or use M16
cable gland
IQ1 & IQ2
C (+24V)
} humidity
IN
C
} temperature
IN
terminate screens at IQ end
2 analog input channels
linked for current (I)
linked for thermistor (T)
N
N+1
IQ3
humidity
temperature
linked for current (I)
linked for thermistor (T)
0 (0V)
N (in)
I-P
I-N
TH
TH
+ (+24V)
0 (0V)
N+1 (in)
+ (+24V)
terminate screens at IQ end
HT/D/2%
IQ1 & IQ2
C (+24V)
I-P
I1N
I2N
IN
C (+24V)
IN
} humidity
} temperature
2 analog input channels
linked for current (I)
linked for current (I)
terminate screen at IQ end
N
temperature
N+1
IQ3
humidity
linked for current (I)
linked for current (I)
0 (0V)
N (in)
I-P
I1N
I2N
+ (+24V)
0 (0V)
N+1 (in)
+ (+24V)
terminate screen at IQ end
Note that when connecting to IQ3, in order to provide sufficient supply current to the sensor, the sensor I-P terminal must
be connected to both channels’ 24 V terminals.
Replace Connector
8
2
HT/D Duct Humidity and Temperature Sensors Installation Instructions TG200988 Issue 1/A 30/01/08
Replace Lid
9
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