Specifications - Laars MFTCF140 Installation And Operation Instructions Manual

combustion readings. At this point, just record the CO 2 readings at MAX Fire. Do NOT attempt to adjust
CO 2 at MAX Fire. ONLY in MIN Fire, so...
18.
Per Table B for MIN Fire , change dip switch 6 to OFF and 7 to ON. The unit will cycle down to MIN Fire.
Page 4
19.
WAIT for your combustion analyser to stabilize. Then check the CO 2 measurement at MIN fi re. Refer to

2.2 Specifications

Table D for acceptable MIN fi re combustion readings.
20.
If CO 2 readings in Max Fire and MIN fi re are acceptable, then skip ahead to Step 23. If not, then open the
Model Name
Gas Valve Adjustment Port by removing the cap screw with a 4mm Allen wrench. See Figure E.
21.
Then use the 4 mm Allen wrench to make a minor adjustment (1/8 turn) to either increase or decrease CO 2 .
Gas Input Rate
Hot Water Capacity
Installation
Flue System
Vent Run
Gas Supply Pressure
Manifold Pressure
Power Supply
Ignition System
Burner System
Gas Valve System
Minimum Flow Rate
Dimensions
Sub Heat Exchanger Water Capacity(DHW)
Main Controller / Control Panel
Water Pressure
Connection Sizes
Materials
Safety Devices
MAX
MIN
Manifold pressure
35°F Rise
45°F Rise
MAX Fire
MFTCF140
77°F Rise
MIN Fire
MAX Fire
MFTCF199
MIN Fire
Table C
NG
LP
Gas Type
CO value
2
Vent size
MAX Fire
Min fire
MFTCF140
MFTCF140
MIN Fire
Low fire
MAX Fire
Main Supply
MFTCF199
MIN Fire
Maximum Power
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
Consumption
Table D
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
Weight
Cold Water Inlet / Hot
Water Outlet
Space Heating
Supply / Return
Gas Inlet
Casing
Heat Exchanger
MFTCF140
'NG' type combustibility
2" VENT 3" VENT
"
-0.15 WC -0.216
"
0 WC 0.002
Indoor / Floor stand type
"
-0.134 WC
Sealed Combustion Direct / Single / Concentric Vent/ SideWall Vent
"
-0.015 WC
2"(50ft) , 3"(100ft) Schedule 40 CPVC, PP
3.5" WC to 10.5" WC
8.0" WC to 13" WC
'NG' type combustibility
LP
2" VENT 3" VENT
2" VENT 3" VENT
8.5~10.5%
-0.15" WC -0.216" WC
8~10%
0.1" WC 0.079" WC
8.5~10.0%
120V 60Hz / 6A
Customer Service and Product Support:
20
Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355
800.900.9276 • Fax 800.559.1583
Headquarters:
8~10%
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
Direct Electronic Ignition / Automatic Flame Sensing
www.Laars.com
Single Orifice Premixed Fuel Modulation Ceramic Infrared
Combination modulating (Current proportional)
W15.7" - H52.4" – D26.7"
Under 15 Gallon
GTX-920CP / P-920C
Min 15 ~ Max 150 PSI
Cold Rolled Carbon Steel
Primary Heat Exchanger : Stainless Steel
Sub Heat Exchanger : Stainless Steel
Flame Rod, Overheat Cut Off Device, Gas Valve Operation
Detector, Exhaust Temperature High Limit Switch, Water
Temperature High Limit Switch
LAARS Heating Systems
140,000 Btu/h
28,000 Btu/h
'LP' type combustibility
7.1 Gal
2" VENT
5.5 Gal
" "
WC -0.15 WC -0.216
3.2 Gal
" "
WC 0.1 WC 0.079
"
-0.173 WC
"
-0.015 WC
'LP' type combustibility
NG
2" VENT
2" VENT 3" VENT
9.5~11 %
-0.15" WC -0.216" WC
9~10.5 %
0" WC 0.002" WC
9.5~11 %
800.900.9276 • Fax 800.559.1583
9~10.5 %
(Customer Service, Service Advisors)
160W
Litho in U.S.A. © Laars Heating Systems 1607 Document 4290A
0 .5GPM
150 lbs
3/4" NPT
1" NPT
3/4" NPT
3" VENT
"
WC
"
WC
3" VENT
(Applications Engineering
pg 3 o