Hamworthy QAA73.210, Installation, Commissioning And Servicing Instructions

Page: 42 / 44

HAMWORTHY HEATING LTD QAA73.210
Programmable Room Unit
500001305/B
34
APPENDIX A: Sensors
External Air Sensor QAC34
The outside sensor consists of plastic housing with a removable cover. The
sensing element is embedded in synthetic resin. The connection terminals are
accessible after removal of the cover. To introduce the cable through the wall,
a grommet, cable gland or sealing compound is required (also refer to
illustration below). For wall mounting, a cable entry gland Pg 11 can be fitted
to the bottom of the housing.
External Sensor QAC34
Type Ref Sensing
Element
Range
(°C)
Tolerance
(K*)
Time
Constant
(min)
Weight
(g)
Copper
Cable
(mm2)
/Cable Dia
(mm)
Perm. Cable
Length
(m)
QAC34/101 NTC1000 Ω
at 20°C
- 50… 70 ± 1 12 73 1.5 / 7.2 120
* QAC34/101 at - 10 - +20C. The sensing element is an NTC resistor with a resistance of 1000 Ω at 25°C. The
resistance drops at about 4% per Kelvin.
18
11
Z
0
1a
1
2
18
11
Z
02
a
H
H
2
/
1
1811Z
03a
N
N-W
3
mi
n2
,5
m
18
11
Z
04
a
4
Mounting Position:
Dimensions:
49,7
91
,6
79,8
1
81
1M
01
a
3
8,5
5,5
14,1
25 24,5
49,5
9
,5
4
5
,5
6
1
81
1
M
0
2