RT-SVX060A-GB
37
11
UNT-PRC002-GB
Sound power levels
Discharge
Measurement conditions:
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
long) fixed to its discharge opening.
Fan
Power level in dB(A), per Hz frequency band
Overall power
Unit
speed
125
250
500
1000
2000
4000
8000
dB(A)
1
55
50
42
37
37
31
30
46
FWD 08
2
57
54
47
40
30
38
40
50
3
58
57
50
42
32
40
43
53
1
57
51
45
42
34
33
28
48
FWD 10
2
58
54
48
45
38
39
35
51
3
60
58
50
48
40
42
39
54
1
57
51
45
42
34
33
28
48
FWD 12
2
58
54
48
45
38
39
35
51
3
60
58
50
48
40
42
39
54
1
56
62
50
48
39
38
36
56
FWD 14
2
61
66
55
53
47
46
45
60
3
63
69
58
56
50
50
49
63
1
57
63
51
49
40
39
37
57
FWD 20
2
61
66
55
53
47
46
45
60
3
63
69
58
56
50
50
49
63
Intake
Measurement conditions:
Measurements taken at the horizontal air intake.
Fan
Power level in dB(A), per Hz frequency band
Overall power
Unit
speed
125
250
500
1000
2000
4000
8000
dB(A)
1
56
55
55
53
46
45
42
57
FWD 08
2
63
62
60
60
53
53
53
64
3
66
65
63
62
56
55
57
67
1
62
58
55
58
51
48
44
61
FWD 10
2
66
63
60
62
56
55
52
66
3
70
67
63
65
59
59
57
69
1
62
58
55
58
51
48
44
61
FWD 12
2
66
63
60
62
56
55
52
66
3
70
67
63
65
59
59
57
69
1
66
65
65
65
57
50
46
68
FWD 14
2
73
72
69
71
64
59
57
74
3
78
76
73
75
69
64
63
78
1
68
72
64
64
56
52
50
69
FWD 20
2
76
76
68
71
65
61
61
75
3
78
79
71
74
69
66
66
78
Electric Heater
Electric heater are fitted on the supply fan discharge.
Heaters have two heating stages and provided with two
types of overheat thermostats:
• Automatic reset thermostats which stop the electric
heater when air temperature rises to 65°C.
• The manual reset thermostat which stops the unit
when the air temperature rises to 128°C.
Figure 20 - Electric Heater Pressure Drop
0
10
20
30
40
50
60
70
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
Ai
r P
re
ss
ure
D
ro
p
Airflow Rate (m3/h
)
ELECTRICAL HEATER AIR PRESSURE DROP
Figure 21 - Electric heaters installed on the unit
(Downflow and horizontal supply air flow)
Burner module
PCH : premix burner with a condensing heat exchanger
Figure 22 - Modulating (PCH) gas valves and variable
speed combustion blower
Flue gas
outlet
Condensate water
Drain pipe on PCH not on PRH
Natural Gas (G20 / G25)
Or LPG (G31)
Air
HX + combustion chamber
100% stainless steel
Modulating (PCH) or staged (PRH) gas valves
& variable speed combustion blower
Figure 23 - Gas heat air pressure drop
0
50
100
150
200
250
300
350
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
Ai
r P
re
ss
ure
D
ro
p
Airflow Rate (m3/h)
GAS HEAT AIR PRESSURE DROP
Low Heat
Standard Heat
High Heat
Assembly procedure of fan block
All ERC specific electrical components are located in the
electrical box. Electrical connections of exhaust fan must
be performed on site.
Options
