Adjustments, Low-Fire Adjustment | Honeywell V4062C, V4062B instruction

V4062A,B,D HI-LO-OFF FLUID POWER GAS VALVE ACTUATOR

					FIRING	2
					RATE	2
					RATE
		L1	1		CONTROLLER
		L1	1
	4	HOT		L2
	4
3	4		1
					L2
		3	2
					FLAME SAFEGUARD
					PROGRAMMER–MAIN
AUXILIARY					VALVE CONNECTIONS
SWITCH			C	C
			C	C
			NC	NC
			NO	NO
		PROOF-OF-
5		CLOSURE SWITCH			5
6					6

1POWER FROM FLAME SAFEGUARD CONTROL.

2ACTUATOR OPENS TO LOW-FIRE POSITION WHEN FIRING RATE CONTROLLER SWITCH IS OPEN AND LINE VOLTAGE IS SUPPLIED TO TERMINALS L1 AND L2. ACTUATOR OPENS FULLY WHEN THE FIRING RATE CONTROLLER SWITCH IS CLOSED AND POWER IS SUPPLIED TO TERMINALS L1 AND L2.

3INTERNAL JUMPER.

4FOR LOW-FIRE ADJUSTMENT AFTER BURNER IS IN OPERATION. DISCONNECT FIRING RATE CONTROLLER LEADWIRE FROM TERMINAL 4.

5SWITCH BETWEEN THESE TWO LEADS IS CLOSED WHEN VALVE IS SHUT (DE-ENERGIZED).

6SWITCH BETWEEN THESE TWO LEADS IS OPEN WHEN VALVE IS

SHUT (DE-ENERGIZED).

M7339

Fig. 4. Typical hookup for V4062 Actuator.

ADJUSTMENTS

Low-Fire Adjustment

The low-fire position is adjustable from 0.16 in. to 0.64 in. (with respect to V5055/V5097B Valve) valve stem travel. A dial on the low-fire cam (Fig. 6) indicates the low-fire setting. Because the cam rotates as the valve opens, scales are marked on the dial so the low-fire setting can be observed with the valve in any position. One scale is visible when the actuator is closed, and the other is visible when it is open. These scales are not independent; the same setting applies to both. The low-fire setting is adjusted either before the actuator is installed or after the entire system is operational. Refer to form 70-8311 for valve flow (capacity) curves.

IMPORTANT:

When using the V4062 with a V5055/V5097C or E Valve (with double seal), match low-fire minimum position to burner and application. Too low a position could result in loss of burner flame. This low-fire position should also be checked at periodic maintenance intervals.

For most effective use of the V4062/V5055 or V4062/V5097, be sure to select a valve body size closely corresponding to burner capacity. An oversized valve might not allow the low- fire rate to be adjusted to the desired minimum setting.

The V4062 Actuator is shipped from the factory with the low- fire setting at MAX to provide a valve gas flow of approximately 50 to 60 percent, which is adequate for safe lightoff until the final setting can be determined.

LOW-

FIRE

CAM

DIAL

7800 SERIES RELAY MODULE L2

3 4

TRAVEL

LIMIT

SWITCH

PUMP

VALVE

PUMP

MOTOR

ADJUSTABLE NO MAX

FLOW NC LIMIT

SWITCH

SETSCREW

DUAL LOW-FIRE SETPOINT INDICATORS (SHOWN AT MAX WITH VALVE OPEN)

MAX
	E
FIRE	D
FIRE	C
LO	B
	A
MIN

M7340

FIELD WIRING INTERNAL WIRING

M12798

Fig. 6. Low-fire position can be adjusted from 0.16 in. to 0.64 in. (with respect to V5055/V5097B) valve stem travel.

Fig. 5. Connecting Max Flow Limit Switch

to the actuator.

60-2099—8

V4062C, V4062B specifications

The Honeywell V4062B and V4062C are advanced zone valves that play a critical role in modern heating and cooling systems. Designed for use with hot water heating systems, these valves provide efficient control of fluid flow in residential and commercial HVAC applications.

The V4062B series features robust construction and is designed to handle a range of installation environments. It operates on a two-wire system, simplifying wiring and installation. The valve is typically used for applications involving fan coil units, radiant heating, and other hydronic systems. With a high flow capacity, the V4062B allows effective temperature regulation throughout various zones, ensuring optimal comfort in any setting.

On the other hand, the V4062C model brings additional functionalities. This variant includes a microprocessor-based system that enhances control capabilities. The smart technology embedded in the V4062C enables precise modulation of water flow based on real-time temperature readings. This innovative feature significantly improves energy efficiency, ultimately leading to lower operating costs.

Both the V4062B and V4062C models incorporate durable materials to guarantee longevity and reliability. The valve bodies are crafted from corrosion-resistant brass, ensuring a prolonged lifespan even in challenging environments. Additionally, they are designed with a union connection that facilitates easy installation and maintenance, reducing labor costs and downtime.

An important characteristic shared by both models is their compatibility with standard 24 VAC systems, allowing them to seamlessly integrate with existing HVAC setups. Moreover, they feature a compact design, which is particularly advantageous in installations with limited space. This adaptability makes them a popular choice among HVAC professionals seeking reliable and efficient solutions.

Both the V4062B and V4062C series valves are equipped with manual override features, enabling users to adjust flow manually when needed. This can be especially useful in emergency situations or during system maintenance.

In summary, the Honeywell V4062B and V4062C valves stand out for their reliability, efficiency, and advanced technology. With their durable construction and smart control features, they serve as efficient solutions for managing zoning within heating and cooling systems, promising comfort and energy savings for any property.