User manual

Installation & Servicing Instructions Rinnai Q-Series
41
!
WARNING
Compensation factor vent system CP(V) table 10
Compensation factor altitude CP(A) table 11
Q85 Q130 Q175 Q205
min max
0 10 0 0 0 0
11 20 0 0 2 3
21 30 0 2 4 6
31 40 1 4 6 10
41 60 2 6 10 n.a.
61 80 3 8 15 n.a.
81 100 4 10 n.a. n.a.
CF(V)
BoilertypeEq.length(ft)
min max
0 1
1,000 2,000
2,000 3,000
3,000 4,000
4,000 5,000
5,000 6,000
6,000 7,000
7,000 8,000
8,000 9,000
9,000 10,000
Altitude(ft) Boilertype
Q85
,
Q130
,
Q175
,
Q205
CF(A)
0
6
12
18
24
54
30
36
42
48
NOTICE
i
6.7.8Calculationofcompensationfactor
The compensation factor eliminates or reduces the natural effect of derate of maximum
input caused by the resistance of the vent system and/or the impact of the altitude.
1. Determine the Compensation Factor Vent System CF(V) in the table below.
2. Determine the Compensation Factor Altitude CF(A) in the table below.
Any application or installation above 10,000 must be reviewed by Rinnai's
Engineeringgroup.Thisistoensuretheproductisinstalledandtheoverall
system is designed properly and that the units are commisioned properly.
NotinvolvingofRinnai'sEngineeringgroupwouldresultinnosupportofthe
productandnowarranty.
3. Calculate the Compensation Factor Total CF(T):
CF(T) = CF(V) + CF(A)
The result is the setting for Parameter 73.
Change parameter 73 according to this result. See Chapter 11.1 how to change
parameters.
Example of calculation:
Q175
Eq. lenth vent system (taken from previous example) 46 ft CF(V) = 10
Altitude 7,200ft CF(A) = 42 +
CF(T) = 52
Parameter setting (Par. 73) = 52
Donotovercompensatetheboilerbysettingahighervaluethancalculated,
otherwisetheboilercouldbeseriouslydamaged.