Mestek RBI FlexCore CK1000, Installation And Operation Instructions Manual

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Cast Iron Condensing Boilers – Installation Manual
FlexCore Stainless Steel Condensing Boilers – Installation Manual
**Located on outlet flange of gas valve. (Figure 17)
Due to job conditions, deviation from specified may be required – allow ± (0.2)% range adjustment.
Note: When units are installed with direct sealed combustion air, during periods of time with low outdoor
temperature, it is possible for the room air to condense and possibly form frost on the air handling components
of the boiler. Refer to: (2015 ASHRAE Cold-Climate Buildings Design Guide).
Table 11 - Combustion Settings
Table 12 - Pressure Signal (P) - (Nat. Gas)
Firing
Rate
0850 1000 1500 2000 2500 3000
3500
(Delta P - W.C.)
4000
(Delta P - W.C.)
(Delta P - W.C.) (Delta P - W.C.) (Delta P - W.C.) (Delta P - W.C.) (Delta P - W.C.) (Delta P - W.C.)
Front
Module
Rear
Module
Front
Module
Rear
Module
100% 7.50 8.00 9.50 9.00 9.00 7.50 9.50 9.00 9.00 9.50
33% 0.90 0.95 1.20 1.15 1.15 0.90 1.20 1.15 1.15 1.20
25% 0.65 0.70 0.80 0.75 0.75 0.65 0.80 0.75 0.75 0.80
20% 0.40 0.45 0.45 0.45 0.45 0.40 0.45 0.45 0.45 0.45
Firing
Rate
4500
(Delta P - W.C.)
5000
(Delta P - W.C.)
6000
(Delta P - W.C.)
7000
(Delta P - W.C.)
8000
(Delta P - W.C.)
9000
(Delta P - W.C.)
Front
Module
Rear
Module
Front
Module
Rear
Module
Front
Module
Rear
Module
Front
Module
Middle
Module
Rear
Module
Front
Module
Middle
Module
Rear
Module
Front
Module
Middle
Module
Rear
Module
100% 9.50 9.00 9.00 9.50 7.00 7.50 9.00 10.00 9.50 10.00 9.00 8.50 8.50 8.50 8.50
33% 1.20 1.15 1.15 1.20 0.85 0.90 1.15 1.25 1.20 1.25 1.15 1.00 1.00 1.00 1.00
25% .80 .75 .75 .80 0.60 0.65 .75 .85 .80 .85 .75 .72 .72 .72 .72
20% .45 .45 .45 .45 0.40 0.40 .50 .50 .50 .50 .50 .50 .50 .50 .50
To determine signal in mm WC, multiply signal pressure by 25.4.
-40°F
-30°F
-20°F
-10°F
0°F
10°F
20°F
30°F
40°F
50°F
60°F
70°F
80°F
90°F
100°F
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
8.0
8.1
8.2
8.3
8.4
8.5
8.6 8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
9.0
9.1
9.2
9.3
9.4 8.3
8.1
7.9
7.8
7.6
7.4
7.2
7.1
6.9
6.7
6.5
6.4
6.2
6.1
5.9
Inlet
Air
Temp.
O
2
%
NG
6.9
6.7
6.5
6.4
6.2
6.1
5.9
5.7
5.5
5.3
5.2
5.0
4.8
4.7
4.5
CO
2
%
Low
Fire
High
Fire
Low
Fire
High
Fire
FlexCore-Series Whirlwind
Bekaert Burner
w/Gas Orifice Slide Trim**