Trane Technologies BAYHALT250 Installer's Manual

Installer's Guide
High Altitude Conversion Kit
For S9V2-VS Furnace Models
Models:
BAYHALT250, BAYHALT251, BAYHALT252, BAYHALT253, BAYHALT254,
BAYHALT255, BAYHALT256, BAYHALT257, BAYHALT258, BAYHALT259
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES.
IMPORTANT - This document is customer property and is to remain with this unit. Please return to service information pack upon
completion of work.
!
This conversion kit shall be installed by a qualified service
agency in accordance with the furnace manufacturer's
instructions and all applicable codes and requirements
of the authority having jurisdiction. If the information
in these instructions is not followed exactly, a fire, an
explosion or production of carbon monoxide may result
causing property damage, personal injury or loss of life.
The qualified service agency is responsible for the proper
installation of the kit. The installation is not proper and
complete until the operation of the converted furnace
is checked as specified in the furnace manufacturer's
instructions supplied with the kit.
A. GENERAL
These high altitude conversion kits are to be used only with
S9V2-VS furnace models. Conversion kit is for use with natural
or propane gas furnaces.
These instructions describe the conversion of these furnaces for
installations exceeding an altitude of 4000 feet above sea level.
Due to the lower density of air at higher altitudes, there would
be insufficient negative pressure developed by the induced draft
blower to maintain normal operation. Therefore, to compensate
for the less dense air, pressure switches must be changed to
prevent nuisance lockouts and/or cycling of the induced draft
blower on high speed. Please note that with the reduced firing
input rates required for high altitude installations, the induced
draft blower has ample capacity to provide sufficient combus-
tion air for proper and safe operation.
Gas Code, Section 11.1.2 and Annex E, for information regarding
the correct procedure to derate the furnace's input.
instructions must be followed to convert these furnaces for high
altitude applications.
This product can expose you to chemicals including
lead, which are known to the State of California to case
cancer and birth defects or other reproductive harm. For
more information go to www. P65Warnings.ca.gov
WARNING
WARNING
Refer to the National Fuel
The following
WARNING
Before proceeding with the conversion, the gas supply
must be shut off prior to disconnecting the electrical
power.
B. CONVERSION
These instructions below apply to S9V2-VS furnaces only.
1. Check for damage to kit contents, and check for all items
listed in Table 1 on page 2.
2. Turn off gas supply to the furnace.
3. Disconnect electrical power to the furnace.
4. Remove the wiring connections from the pressure
switch(es) in the furnace. Mark the wires if needed to
properly identify the replacement.
5. Remove the pressure switch(es) sample tube from the
switch assembly.
6. Remove the pressure switch(es) from the furnace.
7. Install the new pressure switch in the same location and
manner as the old pressure switch.
8. Connect the pressure switch sample tube and electrical
connections.
9. Reconnect the electrical supply to the furnace.
10. Turn on gas supply to the furnace.
11. Reconnect the electrical supply to the furnace.
C. CHECKOUT
Adjust input rate, manifold pressure, and install correct main burner
gas orifice according to the furnace Installer's Guide. Fill out the
information on the conversion label (part number A343079P01)
and attach the label to the exterior of the furnace door. Once the
furnace has been correctly rated for the high altitude installation,
and the pressure switch has been changed, the furnace instal-
lation shall be checked for proper installation and performance.
Refer to the furnace Installer's Guide for checkout procedure.
D. NOTES
1. The use of high altitude calibrated pressure switches in sea
level applications is not permitted.
2. The high altitude pressure switches are factory calibrated
and sealed. Field adjustment is not permitted. If the factory
seal is broken, the product warranty may be voided.
18-CH94D1-1C-EN
CAUTION