Performance Data; Furnace Controls - Greenheck PVF Installation, Operation And Maintenance Manual

Performance Data

Model Input Output
Number (MBH) (MBH)
PVF 100 100 80
PVF 150 150 120
PVF 200 200 160
PVF 250 250 200
PVF 300 300 240
PVF 350 350 280
PVF 400 400 320
Ratings shown are for elevations up to 2000 ft. For higher elevations, the input should be reduced by 4% per 1000 ft. of
elevation above sea level. In Canada, from 2000 to 4500 ft in elevation, the unit must be derated to 90% of the input listed
above. The unit shall also be used in accordance with standard CGA 2.17.

Furnace Controls

Staged Temperature Controls
For Energy Recovery Units without Temperature Control Package
The furnace stage controls are located in the furnace control center. One control is
provided for each stage of heating. The discharge temperature setting is located on
the control furthest to the left. The offset and differential settings for each stage are
preset at the factory; however, field-adjustments may be made to get the best control
for your application. See the literature provided with the controls for further
information.
For Energy Recovery Units with Temperature Control Package
If two-stage control is ordered with a Temperature Control Package, the controller in
the unit's main control center will control the stages of heating. The temperature set
point may be adjusted on the controller (See Temperature Controller IOM).
Staged Burner Adjustments
Setting Manifold Pressure for Two Stage Gas Control
1. Set the unit to high fire by setting the
discharge temperature control or
thermostat to its maximum setting. If the
ambient temperature is warm, the unit
may not stay at high fire.
2. Measure the burner manifold pressure at
the manifold pressure test port (see
Control Center Layout on page 3) using a
"U" tube manometer. The pressure on
high fire should be 3.5 in. wg for natural
gas and 10 in. wg for LP gas. To change
the pressure, adjust the regulator
adjustment screw on the combination gas
valve.
3. Set the unit to low fire by removing the
wire from the high fire terminal on the
combination gas valve.
4. The manifold pressure on low fire for natural gas
should be 0.88 in. wg and 2.5 in. wg for LP gas. To
change the pressure, use the low fire adjustment
screw on the combination gas valve.
20 25 30 35
3704 2963 2469 2116 1852
5556 4444 3704 3175 2778 2469
7407 5926 4938 4233 3704
9259 7407 6173 5291 4630
11111 8889 7407 6349 5556
12963 10370 8642 7407 6481 5761 5185 4714 4321 3989 3704 3457 3241 3050 2881 2729 2593
14815 11852 9877 8466 7407 6584 5926 5387 4938 4558 4233 3951 3704 3486 3292 3119 2963
Air Temperature Rise Through Unit (°F)
40 45 50 55 60
CFM
1646 1481 1347 1235 1140 1058
2222 2020 1852 1709 1587 1481 1389 1307 1235 1170 1111
3292 2963 2694 2469 2279 2116 1975 1852 1743 1646 1559 1481
4115 3704 3367 3086 2849 2646 2469 2315 2179 2058 1949 1852
4938 4444 4040 3704 3419 3175 2963 2778 2614 2469 2339 2222
Solenoid
Figure 4: Combination Gas Valve
65 70 75 80 85
988 926 871
Figure 3: Staged Controls
High Fire Adjustment
Low Fire Adjustment
90 95 100
823 780 741
High Fire
Terminal
5