Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS - Manual (Page 22)

IIN NS ST TA AL LL LA AT TIIO ON N Continued
90° elbow. Subtract 2.5 feet (0.7m) of equivalent length for each
45° elbow.
Masonry Chimney Installation
Do not use a standard masonry chimney to directly vent the
combustion products from this pool heater.
To use a masonry chimney, the chimney must use a sealed,
corrosion-resistant liner system. Sealed, corrosion-resistant liner
systems (singlewall, doublewall, flexible, or rigid) must be rated
for use with a high efficiency, positive pressure vent system.
Corrosion-resistant chimney liner systems are typically made
from a high grade stainless steel such as AL29-4C. The liner
must be properly sized and fully sealed throughout the entire
length. Both the top and bottom of the masonry chimney must
be capped and sealed to provide a dead air space around the liner.
ƽ
WARNING: Do not vent this pool heater into a
masonry chimney without a sealed stainless steel
liner system. Any breaks, leaks, or damage to the
masonry flue/tile will allow the positive-pressure
flue products to leak from the chimney and into
occupied living spaces. This could cause serious
injury or death due to carbon monoxide poisoning
and other harmful flue products.
IMPORTANT: Check with local code officials to
determine code requirements or the advisability of
using a masonry chimney with a sealed corrosion-
resistant liner system.
Vertical DV Venting Termination
You must use the vent termination recommended by the vent
manufacturer for vertical direct vent terminations. Follow all
vertical venting termination information for clearances and
location under Vertical Vent Termination Clearances and
Location, page 10.
Horizontal DV Venting Termination
Horizontal venting (air inlet and flue outlet on the same wall)
uses the pool heater’s internal combustion air blowers to force
the flue products out of the horizontally-terminated flue.
You must purchase a horizontal direct vent kit from the pool heater
manufacturer to ensure proper operation. See TABLE–G, this
page, to determine which horizontal direct vent kit you need.
When installing the vent cap, the wall opening must provide an air
space clearance of 2 inches (5.1cm) around the flue pipe. The
diameter of the opening for installation of the sidewall cap will be
4 inches (10.2cm) larger (minimum) than the nominal diameter of
the installed vent pipe to the horizontal vent cap.
Install the horizontal vent cap from the outside. Mount the vent
cap to the wall using four screws or wall anchors. Seal under the
screw heads with caulking. Install the sealed, AL29-4C vent
pipe from the pool heater to the vent cap.
Horizontal Vent Termination Clearances and Location
Follow all sidewall venting termination information for
clearances and location under Sidewall Vent Termination
Clearances and Location, page 11.
* The DVK kit includes a DV box adapter, air inlet cap, and a sidewall vent termination. The
VDK kit includes a DV box adapter and an air inlet cap. See note on page 12 concerning
DV box adapter.
Flue Pipe Materials
The following manufacturers supply flue materials suitable for
these models. All materials are made with AL29-4C stainless
steel. Call the numbers below for the nearest distributor.
Heat-Fab, Inc. Saf-T CI Vent. 1-800-772-0739.
Protech Systems, Inc. Fas-N-Seal Vent. 1-800-766-3473.
Metal-Fab, Inc. Corr/Guard Vent. 1-800-835-2830.
Combustion Air Inlet Piping
The Direct Vent system requires the installation of a pipe to
supply combustion air from the outdoors directly to the pool
heater. The air inlet piping can either be brought in horizontally
from a sidewall or vertically from the rooftop. Make sure the
combustion air inlet is in the same pressure zone as the vent
terminal.
Commercial Pool Heaters
22
Input Horizontal Vertical
Btu/hr Kit* Kit*
500,000 DVK3004 VDK3026
650,000 DVK3005 VDK3027
750,000 DVK3005 VDK3027
990,000 DVK3000 VDK3023
1,260,000 DVK3001 VDK3024
1,440,000 DVK3001 VDK3024
1,800,000 DVK3002 VDK3024
2,070,000 DVK3002 VDK3024
TABLE-G
Direct Vent Kits