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Summary of Contents for Aprilaire 6404
- Page 1 Zoned Comfort Control System Safety & Installation Instructions Model 6404...
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Page 2: Table Of Contents
SEQUENCE OF OPERATION ......15 SAFETY INSTRUCTIONS Read this Installation Manual before beginning installation of the Aprilaire Zoned Comfort Control System. For questions call Research Products Corporation at (800) 334-6011. -
Page 3: Specifications
Damper LEDs light when the NO contact is closed. c. Damper output terminals for 2 or 3-wire dampers. (2) CONTROL PANEL POWER a. 24 VAC power input serves the main 6404 panel, up to four expansion panels and thermostats. b. The POWER LED light blinks approximately once per second with power applied. -
Page 4: Control Panel Installation
CONTROL PANEL INSTALLATION CAUTION Installer must touch a grounded metal object before handling the Aprilaire control panel to avoid potential loss of programs due to static discharge. RUN WIRE FOR SYSTEM TABLE 1 – WIRES REQUIRED BETWEEN HVAC EQUIPMENT AND CONTROL PANEL... - Page 5 FIGURE 2...
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Page 6: Mount The Control Panel
MOUNT THE CONTROL PANEL NOTE: Mount in location where the temperature will not exceed 158°F and will not drop below freezing (32°F). Do not mount on foundation walls, or on the HVAC equipment or ductwork. These locations can cause the enclosure to become cooler than the surrounding air, which can cause moisture to condense on the enclosure. - Page 7 SET THE STAGE TIME For systems with two-stage equipment (for heat pump applications, this does not include Auxiliary Heat), you have three options for controlling the second stage. The control panel will stage up the equipment outputs based on the number of zones calling for conditioning (# Zones to Stage), the time length of a call (Stage Minutes), or by staging thermostats.
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Page 8: Wire The System
Damper Power and a jumper wire to connect the C Terminal on the Control Power to the C Terminal on the Damper Power. Component Component VA Required Refer to Wiring Schematic Main Control Panel (6404), up to 4 Expansion Panels (6402) 40 VA* Diagram 1 and up to 12 Thermostats... -
Page 9: Select And Wire Thermostats
® 8570, 8344, 8348, 8344, 8348, ZONE 1 ANY ZONE HEAT PUMP HEAT/COOL 8363, 8366 8363, 8366 HEAT/COOL R, W, Y, G, O, B Aprilaire ® 8570 HEAT/ COOL R, W, Y, G Aprilaire ® 8570, (See Note) 8344, 8348,... -
Page 10: Wire The Hvac Equipment To The Control Panel
WIRE THE HVAC EQUIPMENT TO THE CONTROL PANEL WARNING 120-volts may cause serious injury from electrical shock. Sudden operation may cause serious injury from moving parts. Turn off power to HVAC System and leave power disconnected until installation is complete. 1. - Page 11 DIAGRAM 4 – Boiler and A/C DIAGRAM 5 – Radiant Floor First-Stage Heat, Furnace 2nd-Stage Heat and A/C TERMINAL DEFINITIONS Y1 = 1st-stage cooling W1 = 1st-stage TERMINAL DEFINITIONS boiler heat Y1 = 1st-stage cooling G = Fan W1 = 1st-stage radiant floor heat W2 = 2nd-stage furnace heat G = Fan...
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Page 12: Wire Zone Dampers To The Control Panel
WIRE ZONE DAMPERS TO THE CONTROL PANEL 1. Run 2-wire thermostat cable for spring return dampers (normally open or normally closed). Run 3-wire cable for power open/power close dampers. Multiple dampers for the same zone can be paralleled together as shown. 2. -
Page 13: Wire An Aprilaire Humidifier Control Or Electronic Air Cleaner To The Control Panel - Optional
• Connect one of the H terminals on the Humidifier Control to one of the HUM terminals on the 6404 control panel. • Connect the remaining (open) HUM terminal on the 6404 control panel to the humidifier lead (refer to Humidifier Control Installation Manual). -
Page 14: Wire Expansion Panels
WIRE EXPANSION PANELS Up to four expansion panels, each with 2 zones, can be added to the Model 6404 control panel if additional zones are required. To add Model 6402 expansion panels, follow these guidelines: 1. Disconnect the Control Power and Damper Power on the 4. -
Page 15: Sequence Of Operation
SEQUENCE OF OPERATION The 6404 Control Panel is a heat call priority system with automatic mode changeover after 20 minutes of operation. If two calls for opposing mode exist while the system is idle, the Heat call will be satisfied first. The heating equipment will not stop operating until 1.) all heat calls have been satisfied, 2.) the minimum-on time lapses, 3.) the equipment has been on for 20... - Page 16 HEAT/COOL SYSTEM WHERE ANY ZONE SETS THE MODE THERMOSTAT INPUT DEFINITIONS ZONE 1 ANY ZONE All Zones: Heat = W, Cool = Y, Fan = G, 2nd Stage Heat or Cool = 2S HEAT PUMP HEAT/COOL FAN OPERATION A call for Fan from any zone will initiate the G equipment output terminal. The damper terminal at all zones not calling for continuous fan will be energized.
- Page 17 HEAT/COOL SYSTEM WHERE ZONE 1 SETS THE MODE THERMOSTAT INPUT DEFINITIONS ZONE 1 ANY ZONE All Zones: Heat Call = Zone 1 B + W, Cool Call = Zone 1 O + Y, Fan = G, HEAT PUMP HEAT/COOL 2nd Stage Heat or Cool = 2S FAN OPERATION - same as previous HEATING OPERATION - same as previous with the following exception: The Zone 1 B terminal must be continuously energized for the control panel to recognize a call for heat from any zone.
- Page 18 AUXILIARY HEAT OPERATION Auxiliary Heat can be controlled by time or by the thermostats. Thermostat Control (Heat Pump thermostats in all zones): If the Y and W thermostat input terminals at any zone are energized concurrently (assuming the heat pump is on in the Heat mode of operation), the W1 output terminal will energize immediately.
- Page 19 HEAT PUMP SYSTEMS WHERE ZONE 1 SETS THE MODE THERMOSTAT INPUT DEFINITIONS ZONE 1 ANY ZONE All Zones: Heat Call = Zone 1 B + W, Cool Call = Zone 1 O + Y, Fan = G, HEAT PUMP HEAT/COOL 2nd Stage Heat or Cool = 2S, Emergency Heat = see Emergency Heat Operation below FAN OPERATION - same as above sequence HEATING OPERATION –...
- Page 20 An entire line of indoor air quality solutions gives you products that are the best in their categories, and together set a new standard for performance and reliability. Intuitive to use. Easy to maintain. Aprilaire products enhance your comfort, health and energy efficiency. • Automatic Humidifiers • Electronic Thermostats • Ventilation • UV Germicidal Lamps •...
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