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National Comfort Products Comfort Pack U Series User Manual

National Comfort Products Comfort Pack U Series
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Installation
Guide
Comfort Pack Gas
U-Series
Non Condensing Furnace
This unit should be installed in an
OUTSIDE WALL for THRU-THE-WALL
INSTALLATION ONLY!
Read Installation Manual prior to starting the installation.
This manual must be left with the homeowner for future reference.
80% AFUE
National Comfort Products
A Division of National Refrigeration and Air Conditioning Products, Inc.
539 Dunksferry Road • Bensalem, PA 19020-5908
(800) 523-7138 • Fax (215) 639-1674
www.nationalcomfortproducts.com
HEATING & A/C EQUIPMENT
NATIONAL
COMFORT
PRODUCTS
®
Go Thru-the-Wa
CP8
U-Series
HEATING & A/C EQUIPMENT
NATIONAL
COMFORT
PRODUCTS
®
Thru-the-Wa Comfort for a types of Multi-Family Construction
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National Comfort Products Comfort Pack U Series Specifications

General IconGeneral
RefrigerantR-410A
Voltage208/230V
Phase1
Unit WeightVaries by model
DimensionsVaries by model
Sound Level72 dB

Summary

Comfort Pack Nomenclature

Safety Warnings and Precautions

Hazard Intensity Levels

Defines danger levels for compliance with safety protocols.

Electrical Safety Precautions

Covers warnings related to grounding, high voltage, and wiring integrity.

Operational Safety Guidelines

Covers warnings about gas, water damage, installation, and improper operation.

Before You Start Installation

Cabinet Preparation and Bolt Removal

Instructions for removing shipping bolts and preparing the cabinet.

Unit Placement and Wall Mounting

Requirements for unit placement and wall mounting.

Installation Procedures

Drainage System Setup

Details on connecting the primary and secondary drain lines and trap.

Wall Installation and Sealing

Instructions for installing the unit within the wall and sealing.

Clearance Requirements

Installation Clearances

Specifies minimum distances from combustible materials and other units.

Secondary Drain Trap Installation

Step-by-step guide for installing the secondary drain trap.

Unit Location Considerations

Wall Opening and Flashing Guidelines

Guidelines for preparing the wall opening and ensuring proper flashing.

Airflow and Recirculation Prevention

Ensuring adequate airflow and avoiding recirculation issues.

Service Accessibility Requirements

Requirement for 29" clearance for inside service panel access.

Vent Termination Clearances

USA Vent Termination Clearances

Specifies clearances for direct-vented installations per ANSI Z223.1/NFPA 54.

Venting Installation Notes

Important notes regarding venting installation and potential issues.

Electrical System Overview

Electrical Supply and Connections

Guidelines for power supply, wiring, and grounding.

Thermostat and Low Voltage Wiring

Recommendations for thermostat placement and low-voltage wiring.

High Voltage Wiring Diagram

Illustrates the high voltage connections for the unit.

DSI Control Identification

Control Board Component Identification

Identifies key components and terminals on the DSI control board.

Low Voltage Wiring Standards

Details on low voltage common, secondary, and fuse connections.

Dimension Drawing

Gas Furnace Specifications

Gas Valve Settings and BTU Data

Details on gas valve settings, BTU input/output, and temperature rise.

Sequence of Operations for Gas Heat

Step-by-step description of the heating cycle operation.

Abnormal Functions and Operation

Abnormal Function Descriptions

Explains various fault conditions and lockout states.

High Altitude Operation Adjustments

Procedures for adjusting the unit for high altitude installations.

Gas Piping and Pressure Testing

Gas Piping Installation Requirements

Guidelines for gas pipe sizing, support, and connections.

Pressure Testing Supply Piping

Procedures for testing gas supply piping pressure.

Valve Outlet Gas Pressure Settings

Checking Valve Outlet Pressure

Step-by-step instructions for measuring and adjusting gas valve outlet pressure.

Gas Connection Diagram

Illustrates gas connection points and components.

Ignition System Operation

Ignition System Sequence

Describes the direct spark ignition process and its operating sequence.

Combustion Air Proving Switch

Explains the role and operation of the combustion air proving switch.

Limit Switch Functionality

Details the auto-reset limit control and its protective functions.

Heater Start-Up Procedures

Installation Checklist for Start-Up

A comprehensive checklist before initiating the start-up process.

Heater Start-Up Safety Warnings

Critical safety instructions to follow before operating the unit.

Operating Instructions

Operating Sequence and Controls

Steps for operating the unit and sequence of heating activation.

Turning Off Gas to Appliance

Procedure for safely shutting off the gas supply to the appliance.

Post Start-Up Checks

Verifications to perform after the initial start-up.

Maintenance and Service

Cooling Chassis Maintenance

Guidance on maintaining the cooling chassis and its components.

Maintenance Schedule

Recommended intervals for checking filters, cleaning components, and inspecting the unit.

Burner and Heat Exchanger Service

Heat Exchanger Inspection

Procedures for inspecting the heat exchanger for cracks or holes.

Burner Removal and Cleaning

Step-by-step instructions for removing, cleaning, and reinstalling the burner assembly.

Ignition System Components Service

Burner Orifice and Igniter Service

Instructions for servicing the burner orifice and igniter.

Flame Sensor Cleaning

Guidance on cleaning the flame sensor.

Venter Motor and Wheel Assembly Maintenance

Procedures for maintaining the venter motor and wheel assembly.

Control Module and Limit Switches

Limit Control and Gas Valve Function

Explains the function of limit controls and gas valves.

Pressure Switch and Flame Rollout Switch

Details the operation and troubleshooting of pressure and rollout switches.

Troubleshooting with DSI Control Module LED

Interpreting LED signals for diagnosing abnormal conditions.

Slide Out Furnace Instructions

Performance Data

Unit Performance Specifications

Tables detailing cooling and heating performance data by model.

Electrical Data by Model

Electrical characteristics such as voltage, amps, and MCA for each model.

Optional Accessories

Lists available optional accessories for the unit.

Temperature Rise and Airflow Data

Checking Unit Temperature Rise

Instructions for measuring supply and return air temperatures for temperature rise.

Calculating Airflow (CFM)

Formula and reference to airflow data for calculating CFM.

Wiring Diagram

Control Module Status and Wiring

DSI Control Module Status Codes

Explains GREEN and YELLOW LED indicators for operational status and faults.

Field Control Wiring Guidelines

Guidelines for field control wiring length, gauge, and testing.

Troubleshooting Common Issues

Replacement Parts Guide

Cabinet and Furnace Parts Listing

Part numbers for various cabinet and furnace components.

Chassis Parts Listing

Part numbers for components specific to chassis models.

Limited Warranty Information

Warranty Coverage and Exclusions

Outlines the terms, duration, and limitations of the product warranty.

Warranty Claim Procedure

Steps required for customers to initiate and process a warranty claim.

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